init
This commit is contained in:
commit
acc61e858b
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62
utils/git-squash.md
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62
utils/git-squash.md
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---
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layout: default
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title: Git - notes
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categories: software
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---
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Squash the last three commits
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```bash
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git rebase -i HEAD~3
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```
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You will see something like this
|
||||
|
||||
```plain
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pick f392171 Added new feature X
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pick ba9dd9a Added new elements to page design
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pick df71a27 Updated CSS for new elements
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```
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- `pick` `p` the commit will be taken
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- `squash` `s`, the commit will be blended with the above.
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Edit to something like this
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||||
|
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```plain
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pick f392171 New message for this three commit!
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squash ba9dd9a
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squash df71a27
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```
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Now you can accept the change by continuing the rebase:
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|
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```bash
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git rebase --continue
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```
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After that you need to force override the history using this command:
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```bash
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git push origin master --force
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```
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## Squash merge
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```bash
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git checkout master
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git merge --squash bugfix
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git commit
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```
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### Checkout bare repository
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```
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git clone --bare https://github.com/nextcloud/server.git /var/www/nextcloud.git --recursive
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cd nextcloud.git; git worktree add /var/www/nextcloud
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cd /var/www/nextcloud; checkout -f v27.1.4
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|
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git --work-tree=/var/www/nextcloud --git dir=/home/artur/pub/drive/repos/nextcloud.git checkout -f v27.1.4 --recursive
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```
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591
utils/recepies.yml
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591
utils/recepies.yml
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layout: default
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title: Recipes
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type: recipes
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||||
|
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recipes:
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Read a DNS records:
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^: dns networking
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$: dig artgur.net +nostats +nocomments +nocmd
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|
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I/O Stats:
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$: iostat
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|
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Checking type of executable files:
|
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$: otool -hv test.so
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|
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Gzip of image:
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^: compression, zip
|
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$: dd if=/dev/sdb | gzip > ~/backup.img.gz
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|
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Progress with `dd`:
|
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$:
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- sudo dd if=2024-11-19-raspios-bookworm-armhf.img of=/dev/disk27 status=progress
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- sudo dd if=/dev/sdb | pv -s 5.29G | dd of=DriveCopy1.dd bs=4096
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- sudo pv ubuntu-24.04.1-desktop-amd64.iso | sudo dd of=/dev/disk27
|
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|
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Get directory size:
|
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$: du -sh MacOSBackup
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|
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Print all sizes in directory:
|
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$:
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- du -sh *
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- du -shc *
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|
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Compare two files:
|
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$:
|
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- vim -d file1 file2
|
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- mcdiff file1 file2
|
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|
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Disk manager:
|
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$: cfdisk /dev/sda
|
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|
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List of disks:
|
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$: parted -l
|
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|
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Informations about disk:
|
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$: fdisk -l /dev/sda
|
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|
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Power off the disk:
|
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$: udisksctl power-off -b /dev/sdX
|
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|
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Generate random password:
|
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$:
|
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- pwgen -s -1 32
|
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- openssl rand -hex 12
|
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|
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List block devices:
|
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$: lsblk
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|
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Linux headers:
|
||||
-
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$: uname -r
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-
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$: apt search linux-headers-$(uname -r)
|
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|
||||
Show all disks with json format:
|
||||
$: lsblk -J
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|
||||
List disk with uuid's:
|
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$: lsbkl -f
|
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|
||||
|
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vfat file system:
|
||||
- ➜: Create a file systyem
|
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$: mkfs.vfat -F 32 /dev/sdb4
|
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- ➜: Mount the file system
|
||||
$: mount -i -t vfat -oumask=0000,iocharset=utf8 /dev/sdb4 /root
|
||||
|
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See what processes are using the drive:
|
||||
$: lsof /where/drive/is/mounted
|
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|
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See what process opens the port:
|
||||
$:
|
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- lsof -p 6919
|
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- lsof -i :6919
|
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|
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See the stats of IO:
|
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$:
|
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- apt install sysstat iotop
|
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|
||||
- iostat -dh 2
|
||||
- iotop -o
|
||||
- sar -p -d -b 1
|
||||
- vmstat -d 1
|
||||
- vmstat -p /dev/sda2 1
|
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|
||||
Rsync:
|
||||
$: rsync -ah --progress /Volumes/Data /Volumes/Data\ 1/Junk/1TB\ Drive
|
||||
|
||||
reloading local DNS:
|
||||
$: sudo /etc/init.d/dns-clean start
|
||||
|
||||
Print all processes in json format:
|
||||
$: |
|
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ps aux | awk -v OFS=, '{print $1, $2}' | jq -R 'split(",") | {user: .[0], pid: .[1]}'
|
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|
||||
Split files:
|
||||
$: split -b 70M deno
|
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|
||||
Search and execute command from the history:
|
||||
$: eval `history | fzf | cut -s -d " " -f4-`
|
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|
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file: .zshrc
|
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content: |
|
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export HISTSIZE=100000000
|
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alias hexec='eval `history | fzf | cut -s -d " " -f4-`'
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|
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Editing command with editor:
|
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file: ~/.zshrc
|
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content: bindkey '^e' edit-command-line
|
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|
||||
Copy public ssh key:
|
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- cat ~/.ssh/id_rsa.pub | pbcopy
|
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|
||||
change password that was saved in a variable:
|
||||
$: echo "$archpass" | passwd "$archuser" --stdin
|
||||
|
||||
Git diff between branches:
|
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$: git diff release-1.2.0..release-1.2.1
|
||||
|
||||
MacOS info aliases in `.zhrc`:
|
||||
file: .zhrc
|
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content: |
|
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alias cpu='sysctl -n machdep.cpu.brand_string'
|
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alias cpu-temp='sudo powermetrics --samplers smc | grep -i "CPU die temperature"'
|
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alias gpu-temp='sudo powermetrics --samplers smc | grep -i "GPU die temperature"'
|
||||
alias lsusb='sudo ioreg -p IOUSB'
|
||||
alias allusb='ioreg -p IOUSB -w0 -l'
|
||||
|
||||
Power metrics:
|
||||
$: sudo powermetrics --samplers all
|
||||
|
||||
Install pods from non standard localisations:
|
||||
$: |
|
||||
pod 'WASHD', :git => 'https://github.com/vatlib/EasyUITextFields.git'
|
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pod 'WASHD', :path => '/Users/artur/projs/easyuitextfields'
|
||||
|
||||
SQLite select and search results with FZF:
|
||||
$: echo "select * from bookmarks" | sqlite3 bookmarks.db | fzf
|
||||
|
||||
Open file with FZF:
|
||||
$: nvim -o `fzf`
|
||||
|
||||
Set default shell. ZSH in this case:
|
||||
$: sudo chsh --shell /usr/bin/zsh user
|
||||
|
||||
Show Git object:
|
||||
$: pigz -d < .git/objects/02/f2cc93fee0b3cb7c9b75f49e4ded3f9b1480eb
|
||||
|
||||
list of wireless cards:
|
||||
$: lspci -knn | grep Net -A2
|
||||
|
||||
Scan networks:
|
||||
$: iwlist scan
|
||||
|
||||
Shutdown:
|
||||
$: shutdown -h now
|
||||
|
||||
Connect to the network:
|
||||
$: nmcli dev wifi connect TP-Link_5828 password my-secret-pass
|
||||
|
||||
You can forward port `80` to `8090`:
|
||||
$: iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8090
|
||||
|
||||
Allow accepting connections on `8090`:
|
||||
$: iptables -I INPUT -m tcp -p tcp --dport 8090 -j ACCEPT
|
||||
|
||||
Search files that contains particular string:
|
||||
$: grep -rnw "." -e "Search key"
|
||||
|
||||
Remove garbage files:
|
||||
$: find ./ -name ".DS_Store" -depth -exec rm {} \;
|
||||
|
||||
Find files, directories and symbolic links using regex:
|
||||
$: find ./ -iname `fo*` and `F??` -type f,d,l
|
||||
|
||||
Make text from pipe uppercased:
|
||||
$:
|
||||
- cat file.txt | tr [:lower:] [:upper:]
|
||||
- cat file.txt | tr [a-z] [A-Z]
|
||||
- tr [a-z] [A-Z] < linux.txt > output.txt
|
||||
|
||||
Installing packages in python for an user:
|
||||
$: pip3 install --user meson
|
||||
|
||||
|
||||
Calling module through interpreter:
|
||||
$: python3 -m pip install six
|
||||
|
||||
Remove spaces:
|
||||
$: cat file.txt | tr -d ' '
|
||||
|
||||
Remove duplicate characters:
|
||||
input-file: domains.txt
|
||||
content: |
|
||||
www.google.....com
|
||||
www.linkedin.com
|
||||
www.linuxsay.com
|
||||
|
||||
$: cat domains.txt | tr -s '.'
|
||||
output: |
|
||||
www.google.com
|
||||
www.linkedin.com
|
||||
|
||||
Extract digit:
|
||||
$:
|
||||
- echo "My UID is $UID" | tr -cd "[:digit:]\n"
|
||||
- echo "My UID is $UID" | tr -d "a-zA-Z"
|
||||
|
||||
Translate single character:
|
||||
$: echo "My UID is $UID" | tr " " "\n"
|
||||
|
||||
Get path by number:
|
||||
$: echo $PATH | cut -d ":" -f 1
|
||||
|
||||
list search path line by line:
|
||||
$: echo $PATH | tr ":" "\n"
|
||||
|
||||
Screen capture:
|
||||
$:
|
||||
- ffmpeg -f x11grab -video_size 1280x800 -framerate 25 -i $DISPLAY -c:v ffvhuff screen.mkv
|
||||
- ffmpeg -video_size 1280x800 -framerate 25 -f x11grab -i :0.0 -f pulse -ac 2. \
|
||||
-i default -vcodec vp8 -acodec libvorbis myvideo_$(date +%d_%B_%Y_%H:%M).webm
|
||||
|
||||
Take a screenshot:
|
||||
$:
|
||||
- xwd -root -out screenshot.xwd
|
||||
- maim -s -u | xclip -selection clipboard -t image/png -i
|
||||
- imlib2_grab screenshot.png
|
||||
|
||||
Install Python package for the user:
|
||||
$: python3 -m pip install --user pyelftools
|
||||
|
||||
Erase free space:
|
||||
$: sudo diskutil secureErase freespace 1 /Volumes/Data\ Drive
|
||||
|
||||
Format disk:
|
||||
$: sudo diskutil eraseDisk ExFAT data /dev/disk26
|
||||
|
||||
Search for commit:
|
||||
$: alias gf='git log --all --oneline | fzf'
|
||||
|
||||
Converts all files in current directory revursevely:
|
||||
install: brew install imagemagick
|
||||
tags: convert image-magic
|
||||
$: alias rmalfa='find . -name “*.png” -exec convert “{}” -alpha off “{}” \;'
|
||||
|
||||
Weather alias:
|
||||
$: alias weather='curl wttr.in'
|
||||
|
||||
Starting an electron app on wayland:
|
||||
|
||||
- ➜: Start chromium using wayland
|
||||
$: chromium --enable-features=UseOzonePlatform --ozone-platform=wayland
|
||||
|
||||
- ➜: The same for electron-based apps
|
||||
$: |
|
||||
`app-executable` --enable-features=UseOzonePlatform \
|
||||
--ozone-platform=wayland
|
||||
|
||||
Save website As PDF:
|
||||
file: .zshrc
|
||||
content: |
|
||||
function aspdf {
|
||||
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --headless --print-to-pdf="./$1.pdf" $2
|
||||
}
|
||||
|
||||
$: aspdf "filename" "https://domain.com/example.pdf"
|
||||
|
||||
Export Markdown as PDF:
|
||||
$:
|
||||
- pandoc README.md -o README.pdf
|
||||
- pandoc --from=gfm --to=pdf -o README.pdf README.md
|
||||
|
||||
Gem path:
|
||||
content: |
|
||||
export GEM_HOME=$HOME/.gem
|
||||
path=("$GEM_HOME/bin" $path)
|
||||
|
||||
QEMU - port forwarding:
|
||||
$: |
|
||||
qemu-system-i386 -net nic,model=rtl8139 \
|
||||
-net user,hostfwd=tcp::3389-:3389,hostfwd=tcp::443-:443,hostfwd=tcp::992-:992
|
||||
|
||||
SQL using regex:
|
||||
description: Add a check constraint to the `id` column to enforce alphanumeric strings of exactly 5 characters long
|
||||
$: ALTER TABLE short_urls ADD CONSTRAINT id CHECK (id ~ '^[a-zA-Z0-9]{5}$');
|
||||
|
||||
Console font size:
|
||||
description: Edit file → `/etc/default/console-setup`
|
||||
$: dpkg-reconfigure -plow console-setup
|
||||
|
||||
Redirect errors to null device:
|
||||
$: find / 2>/dev/null
|
||||
|
||||
Installing nonfree firmware from repository:
|
||||
description: |
|
||||
I.e: Firmware for nonfree driver for Intel's WIFI cards.
|
||||
https://packages.debian.org/sid/firmware-iwlwifi
|
||||
$: apt-get update && apt-get install firmware-linux-nonfree
|
||||
|
||||
Installing nonfree firmware from manufacturer:
|
||||
|
||||
- ➜: Search for binary. An example
|
||||
link: https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html
|
||||
|
||||
- ➜: Extract and copy like
|
||||
$: cp iwlwifi-cc-a0-46.ucode /lib/firmware
|
||||
|
||||
Linux - RAM disk:
|
||||
|
||||
description: This might be useful for spead up programs that heavily use disk
|
||||
$: mount -t TYPE -o size=SIZE FSTYPE MOUNTPOINT
|
||||
info: |
|
||||
* `TYPE` → either `tmpfs` or `ramfs`.
|
||||
* `SIZE` → ie. `512m`
|
||||
* `FSTYPE` → File system type, either `tmpfs`, `ramfs`, `ext4`, etc.
|
||||
|
||||
file: /etc/fstab
|
||||
content: tmpfs /mnt/ramdisk tmpfs nodev,nosuid,noexec,nodiratime,size=1024M 0 0
|
||||
|
||||
fstab:
|
||||
➜: Use 'blkid' to print the universally unique identifiers, and can be used in fstab file like
|
||||
file: /etc/fstab
|
||||
|
||||
content: |
|
||||
# <file system> <mount point> <type> <options> <dump> <pass>
|
||||
|
||||
UUID=1a38b8ca-e1f5-45e6-bbe8-3abd2775b3a6 / ext4 errors=remount-ro 0 1
|
||||
/swapfile none swap sw 0 0
|
||||
/dev/disk/by-uuid/4D3C-4E36 /mnt/4D3C-4E36 auto nosuid,nodev,nofail,x-gvfs-show 0 0
|
||||
|
||||
UUID=e21eebe4-471a-4375-8c4c-618b3733a940 /home ext4 nodev,nosuid 0 2
|
||||
|
||||
|
||||
Linux - Mount disk from `qcow2` image:
|
||||
|
||||
- ➜: Step 1 - Enable NBD on the Host
|
||||
$: modprobe nbd max_part=8
|
||||
|
||||
- ➜: Step 2 - Connect the QCOW2 as network block device
|
||||
$: qemu-nbd --connect=/dev/nbd0 /var/lib/vz/images/100/vm-100-disk-1.qcow2
|
||||
|
||||
- ➜: Step 3 - Find The Virtual Machine Partitions
|
||||
$: fdisk /dev/nbd0 -l
|
||||
|
||||
- ➜: Step 4 - Mount the partition from the VM
|
||||
$: mount /dev/nbd0p1 /mnt/somepoint/
|
||||
|
||||
- ➜: Step 5 - After you done, unmount and disconnect
|
||||
$:
|
||||
- umount /mnt/somepoint/
|
||||
- qemu-nbd --disconnect /dev/nbd0
|
||||
- rmmod nbd
|
||||
|
||||
Ubuntu - Power management - make Ubuntu do nothing when laptop lid is closed:
|
||||
|
||||
- ➜: Open the `/etc/systemd/logind.conf` file in a text editor as root, for example
|
||||
$: sudo -H gedit /etc/systemd/logind.conf
|
||||
|
||||
- ➜: If `HandleLidSwitch` is not set to ignore then change it
|
||||
$: HandleLidSwitch=ignore
|
||||
note: |
|
||||
Other settings that the action can be ignored: `HandleLidSwitchExternalPower`, `HandleLidSwitchDocked`, `IdleAction`.
|
||||
|
||||
- ➜: Restart the systemd daemon (be aware that this command will log you out)
|
||||
$:
|
||||
- sudo systemctl restart systemd-logind
|
||||
- sudo service systemd-logind restart
|
||||
|
||||
Chroot environment of Debian sid:
|
||||
|
||||
- ➜: Install Bootstrap
|
||||
$: sudo apt install debootstrap
|
||||
|
||||
- ➜: Create a directory that you want to use for the base system (_chroot-debian_ in this case)
|
||||
$: mkdir chroot-debian
|
||||
|
||||
- ➜: Create a base system
|
||||
$: sudo debootstrap sid chroot-debian http://deb.debian.org/debian
|
||||
note: Valid names `sid`, `stable` or any debian code name
|
||||
|
||||
- ➜: Mount filesystems
|
||||
$:
|
||||
- sudo mount -o bind /dev chroot-debian/dev
|
||||
- sudo mount -t sysfs none chroot-debian/sys
|
||||
- sudo mount -o bind /proc chroot-debian/proc
|
||||
|
||||
- ➜: Optionally, copy DNS resolver configuration.
|
||||
$: sudo cp /etc/resolv.conf /path/to/chroot-env/etc/resolv.conf
|
||||
|
||||
- ➜: Start chrooting
|
||||
$: sudo chroot chroot-debian /bin/bash
|
||||
|
||||
- ➜: Once done, exit the session and unmount
|
||||
$: sudo umount chroot-debian/dev chroot-debian/proc
|
||||
|
||||
Pass variables to chrooted environment:
|
||||
$: chroot ./ env -i PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
|
||||
|
||||
Allowing user to run a command as root:
|
||||
$: sudo visudo
|
||||
content: artur ALL=(ALL) chroot /path/to/chroot-env
|
||||
|
||||
|
||||
Nginx - serving files setup DAV:
|
||||
|
||||
- ➜: Full version with 3rd party extensions
|
||||
$: apt install nginx-full nginx-extras
|
||||
|
||||
-
|
||||
content: |
|
||||
location / {
|
||||
index nonextistent;
|
||||
autoindex on;
|
||||
autoindex_format json;
|
||||
}
|
||||
|
||||
location /restricted {
|
||||
fancyindex on;
|
||||
fancyindex_exact_size off;
|
||||
auth_basic "Restricted";
|
||||
auth_basic_user_file "/etc/nginx/.htpasswd";
|
||||
}
|
||||
|
||||
location /dropbox {
|
||||
index nonextistent;
|
||||
autoindex on;
|
||||
autoindex_format json;
|
||||
|
||||
dav_methods PUT DELETE MKCOL COPY MOVE;
|
||||
dav_ext_methods PROPFIND OPTIONS LOCK UNLOCK;
|
||||
dav_access user:rw group:r all:r;
|
||||
|
||||
# client_max_body_size 0;
|
||||
create_full_put_path on;
|
||||
client_body_temp_path /tmp/;
|
||||
|
||||
limit_except GET PROPFIND OPTIONS HEAD {
|
||||
auth_basic "Restricted";
|
||||
auth_basic_user_file "/etc/nginx/.htpasswd";
|
||||
}
|
||||
# auth_pam "Restricted";
|
||||
# auth_pam_service_name "common-auth";
|
||||
}
|
||||
|
||||
- ➜: Create password
|
||||
$:
|
||||
- echo -n 'sammy:' >> /etc/nginx/.htpasswd
|
||||
- openssl passwd -apr1 >> /etc/nginx/.htpasswd
|
||||
|
||||
- ➜: Another method to set the password
|
||||
$:
|
||||
- htpasswd -c /etc/nginx/.htpasswd sammy
|
||||
- htpasswd /etc/nginx/.htpasswd another_user
|
||||
note: UI Client `Cyberduck`
|
||||
|
||||
Backing up the entire OS:
|
||||
$: sudo rsync -aAXHv / --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} /mnt
|
||||
|
||||
|
||||
Python:
|
||||
$: apt install python3-full
|
||||
|
||||
Check battery:
|
||||
- $:
|
||||
- upower -i /org/freedesktop/UPower/devices/battery_BAT0
|
||||
- upower -i `upower -e | grep 'BAT'`
|
||||
- upower -i $(upower -e | grep BAT) | grep --color=never -E "state|to\ full|to\ empty|percentage"
|
||||
|
||||
- ➜: Battery capacity
|
||||
$: cat /sys/class/power_supply/BAT0/capacity
|
||||
|
||||
- ➜: ACPI
|
||||
$:
|
||||
- apt install acpi
|
||||
- acpi -V
|
||||
- acpi -t
|
||||
|
||||
- ➜: Watch the status for example
|
||||
$: watch --interval=5 acpi -V
|
||||
|
||||
How to scan open ports:
|
||||
$:
|
||||
- nmap -sT -p- 10.10.8.8
|
||||
- nmap -p 80 127.0.0.1
|
||||
|
||||
Remove non ASCII characters form the file:
|
||||
$: sed 's/[^[:print:]\t]//g' script.sh > cleaned_script.sh
|
||||
|
||||
Network Manager:
|
||||
|
||||
- ➜: Check Status
|
||||
$:
|
||||
- pacman -S networkmanager
|
||||
- systemctl status NetworkManager
|
||||
|
||||
- $:
|
||||
- nmcli dev status
|
||||
- nmcli radio wifi
|
||||
|
||||
- $: nmcli radio wifi on
|
||||
- $: nmcli dev wifi list
|
||||
- $: nmcli dev wifi connect network-ssid
|
||||
- $: nmcli dev wifi connect network-ssid password "network-password"
|
||||
|
||||
- ➜: With password promot
|
||||
$: nmcli dev wifi connect network-ssid password "network-password"
|
||||
|
||||
- $: nmcli con show
|
||||
|
||||
- $:
|
||||
- nmcli con down ssid/uuid
|
||||
- nmcli con up ssid/uuid
|
||||
|
||||
- $: ip link set eno1 up
|
||||
|
||||
DHCP Client:
|
||||
$: pacman -S dhclient dhcpcd
|
||||
|
||||
Turn dchp on for the interface:
|
||||
$: dhclient eth0 -v
|
||||
|
||||
Create file:
|
||||
|
||||
content: |
|
||||
cat > filename <<- "EOF"
|
||||
file contents
|
||||
more contents
|
||||
EOF
|
||||
|
||||
|
||||
Get data about file include number of links:
|
||||
$: stat f1
|
||||
|
||||
File decryption:
|
||||
$: openssl aes256 -md sha256 -d -in file.enc.zip -out file.zip -pass pass:"<password>"
|
||||
|
||||
Base64:
|
||||
$:
|
||||
- openssl base64 -in qrcode.png -out qrcode.png.base64
|
||||
- openssl base64 -in qrcode.png
|
||||
|
||||
Extract tar.xz:
|
||||
$: tar -xJf file.tar.xz -C destination
|
||||
|
||||
Execute command:
|
||||
|
||||
- ➜: Execute `ls` for each each object in current directory that starts from `D` or `M`
|
||||
$: ls {D*,M*}
|
||||
|
||||
- ➜: Utworzenie dwóch katalogów `test_a`, `test_b`
|
||||
$: mkdir test_{a,b}
|
||||
|
||||
Copy content of directory and merge it. Dereference links:
|
||||
$: cp -LTr /form/ .
|
||||
|
||||
JSON Linux apis:
|
||||
$:
|
||||
- tree -J
|
||||
- ls -l | jq -R -s -c 'split("\n")[:-1]'
|
||||
|
||||
List dependencies:
|
||||
$:
|
||||
- pacman -Sy lld
|
||||
- llvm-nm
|
||||
|
||||
Find location of executable:
|
||||
$: type -a python
|
||||
|
||||
Execute Command when file is changed:
|
||||
-
|
||||
$: brew install fswatch
|
||||
-
|
||||
$: fswatch -o . --exclude "\.build.*$" | xargs -n1 -I{} your-command
|
||||
|
||||
Add capabilities:
|
||||
description: allow all to open 443 port
|
||||
$: sudo setcap 'cap_net_bind_service=+ep' ./service
|
||||
|
||||
Test speed of the drive:
|
||||
$: sudo hdparam -t --direct /dev/mmcblk0
|
||||
941
utils/recepiesmd.md
Normal file
941
utils/recepiesmd.md
Normal file
|
|
@ -0,0 +1,941 @@
|
|||
---
|
||||
layout: default
|
||||
title: Recipes MD
|
||||
---
|
||||
|
||||
#### Read a DNS records
|
||||
|
||||
dig artgur.net +nostats +nocomments +nocmd
|
||||
|
||||
#### I/O Stats
|
||||
|
||||
iostat
|
||||
|
||||
#### Checking type of executable files
|
||||
|
||||
otool -hv test.so
|
||||
|
||||
#### #Receipe Gzip of image
|
||||
|
||||
```shell
|
||||
dd if=/dev/sdb | gzip > ~/backup.img.gz
|
||||
```
|
||||
|
||||
#### Progress with `dd`
|
||||
|
||||
```
|
||||
sudo dd if=2024-11-19-raspios-bookworm-armhf.img of=/dev/disk27 status=progress
|
||||
sudo dd if=/dev/sdb | pv -s 5.29G | dd of=DriveCopy1.dd bs=4096
|
||||
sudo pv ubuntu-24.04.1-desktop-amd64.iso | sudo dd of=/dev/disk27
|
||||
```
|
||||
|
||||
#### Get directory size
|
||||
|
||||
du -sh MacOSBackup
|
||||
|
||||
##### Print all sizes in directory
|
||||
```bash
|
||||
du -sh *
|
||||
```
|
||||
|
||||
```bash
|
||||
du -shc *
|
||||
```
|
||||
|
||||
#### Compare two files
|
||||
|
||||
```bash
|
||||
vim -d file1 file2
|
||||
mcdiff file1 file2
|
||||
```
|
||||
|
||||
### Disk manager
|
||||
|
||||
```bash
|
||||
cfdisk /dev/sda
|
||||
```
|
||||
|
||||
#### List disks
|
||||
|
||||
```
|
||||
parted -l
|
||||
```
|
||||
|
||||
#### informations about disk
|
||||
|
||||
```bash
|
||||
fdisk -l /dev/sda
|
||||
```
|
||||
|
||||
#### Power off the disk
|
||||
|
||||
```
|
||||
udisksctl power-off -b /dev/sdX
|
||||
```
|
||||
#### Generate random password
|
||||
|
||||
```bash
|
||||
pwgen -s -1 32
|
||||
```
|
||||
or
|
||||
```
|
||||
openssl rand -hex 12
|
||||
```
|
||||
#### List block devices
|
||||
|
||||
lsblk
|
||||
|
||||
#### Linux headers
|
||||
|
||||
```
|
||||
uname -r
|
||||
apt search linux-headers-$(uname -r)
|
||||
```
|
||||
|
||||
Show all disks with json format
|
||||
```shell
|
||||
lsblk -J
|
||||
```
|
||||
List disk with uuid's
|
||||
```shell
|
||||
lsbkl -f
|
||||
```
|
||||
|
||||
|
||||
#### MKFS
|
||||
|
||||
```bash
|
||||
mkfs.vfat -F 32 /dev/sdb4
|
||||
```
|
||||
|
||||
```bash
|
||||
mount -i -t vfat -oumask=0000,iocharset=utf8 /dev/sdb4 /root
|
||||
```
|
||||
|
||||
#### See what processes are using the drive
|
||||
|
||||
```
|
||||
lsof /where/drive/is/mounted
|
||||
```
|
||||
|
||||
### See what process opens the port
|
||||
|
||||
```bash
|
||||
lsof -p 6919
|
||||
lsof -i :6919
|
||||
```
|
||||
#### See the stats of IO
|
||||
|
||||
```
|
||||
apt install sysstat iotop
|
||||
```
|
||||
|
||||
|
||||
```
|
||||
iostat -dh 2
|
||||
iotop -o
|
||||
sar -p -d -b 1
|
||||
vmstat -d 1
|
||||
vmstat -p /dev/sda2 1
|
||||
```
|
||||
|
||||
### Rsync
|
||||
|
||||
```
|
||||
rsync -ah --progress /Volumes/Data /Volumes/Data\ 1/Junk/1TB\ Drive
|
||||
```
|
||||
|
||||
|
||||
#### reloading local DNS
|
||||
|
||||
```shell
|
||||
sudo /etc/init.d/dns-clean start
|
||||
```
|
||||
|
||||
#### Print all processes in json format
|
||||
|
||||
``` shell
|
||||
ps aux |
|
||||
awk -v OFS=, '{print $1, $2}' |
|
||||
jq -R 'split(",") | {user: .[0], pid: .[1]}'
|
||||
```
|
||||
|
||||
### Split files
|
||||
|
||||
```
|
||||
split -b 70M deno
|
||||
```
|
||||
|
||||
#### Search and execute command from the history
|
||||
|
||||
```bash
|
||||
eval `history | fzf | cut -s -d " " -f4-`
|
||||
```
|
||||
|
||||
Adding this to `.zshrc`
|
||||
|
||||
```
|
||||
export HISTSIZE=100000000
|
||||
alias hexec='eval `history | fzf | cut -s -d " " -f4-`'
|
||||
```
|
||||
#### Editing command with editor
|
||||
|
||||
`~/.zshrc`
|
||||
|
||||
```
|
||||
bindkey '^e' edit-command-line
|
||||
```
|
||||
#### Copy public ssh key
|
||||
|
||||
```bash
|
||||
cat ~/.ssh/id_rsa.pub | pbcopy
|
||||
```
|
||||
|
||||
#### change password that was saved in a variable
|
||||
|
||||
```bash
|
||||
cho "$archpass" | passwd "$archuser" --stdin
|
||||
```
|
||||
#### Git diff between branches
|
||||
|
||||
git diff release-1.2.0..release-1.2.1
|
||||
|
||||
|
||||
#### MacOS info aliases in`.zhrc`
|
||||
|
||||
```
|
||||
alias cpu='sysctl -n machdep.cpu.brand_string'
|
||||
alias cpu-temp='sudo powermetrics --samplers smc | grep -i "CPU die temperature"'
|
||||
alias gpu-temp='sudo powermetrics --samplers smc | grep -i "GPU die temperature"'
|
||||
alias lsusb='sudo ioreg -p IOUSB'
|
||||
alias allusb='ioreg -p IOUSB -w0 -l'
|
||||
```
|
||||
|
||||
**Power metrics**
|
||||
|
||||
```bash
|
||||
sudo powermetrics --samplers all
|
||||
```
|
||||
#### Install pods from non standard localisations
|
||||
|
||||
```ruby
|
||||
pod 'WASHD', :git => 'https://github.com/vatlib/EasyUITextFields.git'
|
||||
pod 'WASHD', :path => '/Users/artur/projs/easyuitextfields'
|
||||
```
|
||||
|
||||
#### SQLite select and search results with FZF
|
||||
|
||||
```bash
|
||||
echo "select * from bookmarks" | sqlite3 bookmarks.db | fzf
|
||||
```
|
||||
|
||||
#### Open file with FZF
|
||||
|
||||
```bash
|
||||
nvim -o `fzf`
|
||||
```
|
||||
|
||||
#### Set default shell. ZSH in this case
|
||||
|
||||
sudo chsh --shell /usr/bin/zsh user
|
||||
|
||||
#### Show Git object
|
||||
```sh
|
||||
pigz -d < .git/objects/02/f2cc93fee0b3cb7c9b75f49e4ded3f9b1480eb
|
||||
```
|
||||
|
||||
#### list of wireless cards
|
||||
|
||||
lspci -knn | grep Net -A2
|
||||
|
||||
#### Scan networks
|
||||
|
||||
iwlist scan
|
||||
|
||||
#### Shutdown
|
||||
|
||||
shutdown -h now
|
||||
|
||||
#### Connect to the network
|
||||
|
||||
nmcli dev wifi connect TP-Link_5828 password my-secret-pass
|
||||
|
||||
#### You can forward port `80` to `8090`
|
||||
|
||||
```shell
|
||||
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8090
|
||||
```
|
||||
|
||||
#### Allow accepting connections on `8090`
|
||||
|
||||
```shell
|
||||
iptables -I INPUT -m tcp -p tcp --dport 8090 -j ACCEPT
|
||||
```
|
||||
#### Search files that contains particular string
|
||||
|
||||
``` shell
|
||||
grep -rnw "." -e "Search key"
|
||||
```
|
||||
|
||||
#### Remove garbage files
|
||||
|
||||
find ./ -name ".DS_Store" -depth -exec rm {} \;
|
||||
|
||||
#### Find files, directories and symbolic links using regex
|
||||
|
||||
find ./ -iname `fo*` and `F??` -type f,d,l
|
||||
|
||||
#### Make text from pipe uppercased
|
||||
|
||||
```bash
|
||||
cat file.txt | tr [:lower:] [:upper:]
|
||||
cat file.txt | tr [a-z] [A-Z]
|
||||
tr [a-z] [A-Z] < linux.txt > output.txt
|
||||
```
|
||||
|
||||
#### Installing packages for python
|
||||
|
||||
**_just for user_**
|
||||
|
||||
```bash
|
||||
pip3 install --user meson
|
||||
```
|
||||
|
||||
**_calling module through interpreter_**
|
||||
|
||||
```bash
|
||||
python3 -m pip install six
|
||||
```
|
||||
|
||||
#### Remove spaces
|
||||
|
||||
```bash
|
||||
cat file.txt | tr -d ' '
|
||||
```
|
||||
|
||||
#### Remove duplicate characters
|
||||
|
||||
|
||||
```bash
|
||||
$ cat domains.txt
|
||||
|
||||
www.google.....com
|
||||
www.linkedin.com
|
||||
www.linuxsay.com
|
||||
```
|
||||
|
||||
```bash
|
||||
$ cat domains.txt | tr -s '.'
|
||||
|
||||
www.google.com
|
||||
www.linkedin.com
|
||||
```
|
||||
|
||||
#### Extract digit
|
||||
|
||||
``` bash
|
||||
echo "My UID is $UID" | tr -cd "[:digit:]\n"
|
||||
echo "My UID is $UID" | tr -d "a-zA-Z"
|
||||
```
|
||||
|
||||
#### Translate single character
|
||||
|
||||
```bash
|
||||
echo "My UID is $UID" | tr " " "\n"
|
||||
```
|
||||
|
||||
#### Get path by number
|
||||
|
||||
```bash
|
||||
echo $PATH | cut -d ":" -f 1
|
||||
```
|
||||
|
||||
#### list search path line by line
|
||||
|
||||
```bash
|
||||
echo $PATH | tr ":" "\n"
|
||||
```
|
||||
|
||||
#### Screen capture
|
||||
|
||||
```
|
||||
ffmpeg -f x11grab -video_size 1280x800 -framerate 25 -i $DISPLAY -c:v ffvhuff screen.mkv
|
||||
|
||||
ffmpeg -video_size 1280x800 -framerate 25 -f x11grab -i :0.0 -f pulse -ac 2. \
|
||||
-i default -vcodec vp8 -acodec libvorbis myvideo_$(date +%d_%B_%Y_%H:%M).webm
|
||||
```
|
||||
|
||||
#### Take a screenshot
|
||||
|
||||
```bash
|
||||
xwd -root -out screenshot.xwd
|
||||
maim -s -u | xclip -selection clipboard -t image/png -i
|
||||
imlib2_grab screenshot.png
|
||||
```
|
||||
|
||||
#### Install Python package for the user
|
||||
|
||||
python3 -m pip install --user pyelftools
|
||||
|
||||
#### Erase free space
|
||||
|
||||
sudo diskutil secureErase freespace 1 /Volumes/Data\ Drive
|
||||
|
||||
#### Format disk
|
||||
|
||||
sudo diskutil eraseDisk ExFAT data /dev/disk26
|
||||
#### Search for commit
|
||||
|
||||
```bash
|
||||
alias gf='git log --all --oneline | fzf'
|
||||
```
|
||||
|
||||
#### Remove alpha channel from all files
|
||||
|
||||
```bash
|
||||
# ➜ brew install imagemagick
|
||||
```
|
||||
|
||||
**Converts all files in current directory revursevely**
|
||||
|
||||
```bash
|
||||
alias rmalfa='find . -name “*.png” -exec convert “{}” -alpha off “{}” \;'
|
||||
```
|
||||
|
||||
#### Weather alias
|
||||
|
||||
```sh
|
||||
alias weather='curl wttr.in'
|
||||
```
|
||||
|
||||
#### Starting an electron app on wayland
|
||||
|
||||
Start chromium using wayland
|
||||
|
||||
```bash
|
||||
chromium --enable-features=UseOzonePlatform --ozone-platform=wayland
|
||||
```
|
||||
|
||||
It’s the same for electron-based apps:
|
||||
|
||||
```bash
|
||||
`app-executable` --enable-features=UseOzonePlatform \
|
||||
--ozone-platform=wayland
|
||||
```
|
||||
|
||||
#### Save website As PDF
|
||||
|
||||
```bash
|
||||
function aspdf {
|
||||
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --headless --print-to-pdf="./$1.pdf" $2
|
||||
}
|
||||
```
|
||||
|
||||
Usage
|
||||
|
||||
```bash
|
||||
aspdf "filename" "https://superuser.com/questions/592974/how-to-print-to-save-as-pdf-from-a-command-line-with-chrome-or-chromium"
|
||||
```
|
||||
|
||||
### Export Markdown as PDF
|
||||
|
||||
```bash
|
||||
pandoc README.md -o README.pdf
|
||||
```
|
||||
|
||||
```bash
|
||||
pandoc --from=gfm --to=pdf -o README.pdf README.md
|
||||
```
|
||||
|
||||
#### Gem path
|
||||
|
||||
```hash
|
||||
export GEM_HOME=$HOME/.gem
|
||||
path=("$GEM_HOME/bin" $path)
|
||||
```
|
||||
|
||||
#### QEMU - port forwarding
|
||||
|
||||
```bash
|
||||
qemu-system-i386 -net nic,model=rtl8139 \
|
||||
-net user,hostfwd=tcp::3389-:3389,hostfwd=tcp::443-:443,hostfwd=tcp::992-:992
|
||||
```
|
||||
|
||||
#### SQL using regex
|
||||
Add a check constraint to the `id` column to enforce alphanumeric strings of exactly 5 characters long
|
||||
|
||||
```sql
|
||||
ALTER TABLE short_urls ADD CONSTRAINT id CHECK (id ~ '^[a-zA-Z0-9]{5}$');
|
||||
```
|
||||
|
||||
#### Console font size
|
||||
|
||||
Edit file → `/etc/default/console-setup`
|
||||
|
||||
```bash
|
||||
dpkg-reconfigure -plow console-setup
|
||||
```
|
||||
|
||||
#### Redirect errors to null device
|
||||
|
||||
find / 2>/dev/null
|
||||
|
||||
#### Installing nonfree firmware from repository
|
||||
|
||||
I.e: Firmware for nonfree driver for Intel's WIFI cards.
|
||||
|
||||
```
|
||||
https://packages.debian.org/sid/firmware-iwlwifi
|
||||
```
|
||||
|
||||
```bash
|
||||
apt-get update && apt-get install firmware-linux-nonfree
|
||||
```
|
||||
|
||||
#### Installing nonfree firmware from manufacturer
|
||||
|
||||
Search for binary. An example:
|
||||
|
||||
[https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html](https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html)
|
||||
|
||||
Extract and copy like
|
||||
|
||||
```bash
|
||||
cp iwlwifi-cc-a0-46.ucode /lib/firmware
|
||||
```
|
||||
|
||||
### Linux - RAM disk
|
||||
|
||||
This might be useful for spead up programs that heavily use disk.
|
||||
|
||||
```
|
||||
mount -t TYPE -o size=SIZE FSTYPE MOUNTPOINT
|
||||
```
|
||||
* `TYPE` → either `tmpfs` or `ramfs`.
|
||||
* `SIZE` → ie. `512m`
|
||||
* `FSTYPE` → File system type, either `tmpfs`, `ramfs`, `ext4`, etc.
|
||||
|
||||
To make this setting persistent you might want to add to `/etc/fstab` fallowing line
|
||||
|
||||
```plain
|
||||
tmpfs /mnt/ramdisk tmpfs nodev,nosuid,noexec,nodiratime,size=1024M 0 0
|
||||
```
|
||||
|
||||
#### fstab
|
||||
|
||||
Use 'blkid' to print the universally unique identifiers, and can be used in fstab file like
|
||||
|
||||
```
|
||||
# <file system> <mount point> <type> <options> <dump> <pass>
|
||||
|
||||
UUID=1a38b8ca-e1f5-45e6-bbe8-3abd2775b3a6 / ext4 errors=remount-ro 0 1
|
||||
/swapfile none swap sw 0 0
|
||||
/dev/disk/by-uuid/4D3C-4E36 /mnt/4D3C-4E36 auto nosuid,nodev,nofail,x-gvfs-show 0 0
|
||||
|
||||
UUID=e21eebe4-471a-4375-8c4c-618b3733a940 /home ext4 nodev,nosuid 0 2
|
||||
```
|
||||
|
||||
|
||||
### Linux - Mount disk from `qcow2` image
|
||||
|
||||
|
||||
Step 1 - Enable NBD on the Host
|
||||
|
||||
```bash
|
||||
modprobe nbd max_part=8
|
||||
```
|
||||
|
||||
Step 2 - Connect the QCOW2 as network block device
|
||||
|
||||
```bash
|
||||
qemu-nbd --connect=/dev/nbd0 /var/lib/vz/images/100/vm-100-disk-1.qcow2
|
||||
```
|
||||
|
||||
Step 3 - Find The Virtual Machine Partitions
|
||||
|
||||
```bash
|
||||
fdisk /dev/nbd0 -l
|
||||
```
|
||||
|
||||
Step 4 - Mount the partition from the VM
|
||||
|
||||
```bash
|
||||
mount /dev/nbd0p1 /mnt/somepoint/
|
||||
```
|
||||
|
||||
Step 5 - After you done, unmount and disconnect
|
||||
|
||||
```bash
|
||||
umount /mnt/somepoint/
|
||||
qemu-nbd --disconnect /dev/nbd0
|
||||
rmmod nbd
|
||||
```
|
||||
|
||||
### Ubuntu - Power management
|
||||
|
||||
To make Ubuntu do nothing when laptop lid is closed:
|
||||
|
||||
From For 13.10 onwards:
|
||||
|
||||
Open the `/etc/systemd/logind.conf` file in a text editor as root, for example:
|
||||
|
||||
```bash
|
||||
sudo -H gedit /etc/systemd/logind.conf
|
||||
```
|
||||
|
||||
If `HandleLidSwitch` is not set to ignore then change it:
|
||||
|
||||
```bash
|
||||
HandleLidSwitch=ignore
|
||||
```
|
||||
|
||||
Other settings that the action can be ignored: `HandleLidSwitchExternalPower`, `HandleLidSwitchDocked`, `IdleAction`.
|
||||
|
||||
Restart the systemd daemon (be aware that this command will log you out):
|
||||
|
||||
```bash
|
||||
sudo systemctl restart systemd-logind
|
||||
```
|
||||
|
||||
or, from 15.04 onwards:
|
||||
|
||||
```bash
|
||||
sudo service systemd-logind restart
|
||||
```
|
||||
|
||||
### Chroot environment of Debian sid
|
||||
|
||||
Install Bootstrap
|
||||
|
||||
```bash
|
||||
sudo apt install debootstrap
|
||||
```
|
||||
|
||||
Create a directory that you want to use for the base system (_chroot-debian_ in this case)
|
||||
|
||||
```bash
|
||||
mkdir chroot-debian
|
||||
```
|
||||
|
||||
Create a base system
|
||||
|
||||
```bash
|
||||
sudo debootstrap sid chroot-debian http://deb.debian.org/debian
|
||||
```
|
||||
|
||||
Valid names `sid`, `stable` or any debian code name
|
||||
|
||||
Mount filesystems
|
||||
|
||||
```bash
|
||||
sudo mount -o bind /dev chroot-debian/dev
|
||||
sudo mount -t sysfs none chroot-debian/sys
|
||||
sudo mount -o bind /proc chroot-debian/proc
|
||||
```
|
||||
|
||||
Optionally, copy DNS resolver configuration.
|
||||
|
||||
```
|
||||
sudo cp /etc/resolv.conf /path/to/chroot-env/etc/resolv.conf
|
||||
```
|
||||
|
||||
Start chrooting
|
||||
|
||||
```bash
|
||||
sudo chroot chroot-debian /bin/bash
|
||||
```
|
||||
|
||||
Once done, exit the session and unmount
|
||||
|
||||
```bash
|
||||
sudo umount chroot-debian/dev chroot-debian/proc
|
||||
```
|
||||
|
||||
#### Pass variables to chrooted environment
|
||||
|
||||
```bash
|
||||
chroot ./ env -i PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
|
||||
```
|
||||
|
||||
# Allowing user to run a command as root
|
||||
|
||||
```shell
|
||||
sudo visudo
|
||||
```
|
||||
|
||||
```
|
||||
artur ALL=(ALL) chroot /path/to/chroot-env
|
||||
```
|
||||
|
||||
|
||||
#### Nginx - serving files setup DAV
|
||||
|
||||
Full version with 3rd party extensions
|
||||
|
||||
```
|
||||
apt install nginx-full nginx-extras
|
||||
```
|
||||
|
||||
```
|
||||
location / {
|
||||
index nonextistent;
|
||||
autoindex on;
|
||||
autoindex_format json;
|
||||
}
|
||||
|
||||
location /restricted {
|
||||
fancyindex on;
|
||||
fancyindex_exact_size off;
|
||||
auth_basic "Restricted";
|
||||
auth_basic_user_file "/etc/nginx/.htpasswd";
|
||||
}
|
||||
|
||||
location /dropbox {
|
||||
index nonextistent;
|
||||
autoindex on;
|
||||
autoindex_format json;
|
||||
|
||||
dav_methods PUT DELETE MKCOL COPY MOVE;
|
||||
dav_ext_methods PROPFIND OPTIONS LOCK UNLOCK;
|
||||
dav_access user:rw group:r all:r;
|
||||
|
||||
# client_max_body_size 0;
|
||||
create_full_put_path on;
|
||||
client_body_temp_path /tmp/;
|
||||
|
||||
limit_except GET PROPFIND OPTIONS HEAD {
|
||||
auth_basic "Restricted";
|
||||
auth_basic_user_file "/etc/nginx/.htpasswd";
|
||||
}
|
||||
# auth_pam "Restricted";
|
||||
# auth_pam_service_name "common-auth";
|
||||
}
|
||||
```
|
||||
|
||||
Create password
|
||||
|
||||
``` bash
|
||||
echo -n 'sammy:' >> /etc/nginx/.htpasswd
|
||||
openssl passwd -apr1 >> /etc/nginx/.htpasswd
|
||||
```
|
||||
|
||||
Another method to set the password
|
||||
|
||||
```bash
|
||||
htpasswd -c /etc/nginx/.htpasswd sammy
|
||||
htpasswd /etc/nginx/.htpasswd another_user
|
||||
```
|
||||
|
||||
**UI Client `Cyberduck`**
|
||||
|
||||
#### Backing up the entire OS
|
||||
|
||||
```
|
||||
sudo rsync -aAXHv / --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} /mnt
|
||||
```
|
||||
|
||||
Python
|
||||
|
||||
```
|
||||
install python3-full
|
||||
```
|
||||
|
||||
### Check battery
|
||||
|
||||
```bash
|
||||
upower -i /org/freedesktop/UPower/devices/battery_BAT0
|
||||
upower -i `upower -e | grep 'BAT'`
|
||||
upower -i $(upower -e | grep BAT) | grep --color=never -E "state|to\ full|to\ empty|percentage"
|
||||
```
|
||||
|
||||
Battery capacity
|
||||
|
||||
```bash
|
||||
cat /sys/class/power_supply/BAT0/capacity
|
||||
```
|
||||
|
||||
`apt install acpi`
|
||||
|
||||
acpi -V
|
||||
acpi -t
|
||||
|
||||
Watch the status for example:
|
||||
|
||||
```
|
||||
watch --interval=5 acpi -V
|
||||
```
|
||||
|
||||
### How to scan open ports
|
||||
|
||||
```
|
||||
nmap -sT -p- 10.10.8.8
|
||||
nmap -p 80 127.0.0.1
|
||||
```
|
||||
|
||||
|
||||
### Remove non ASCII characters form the file
|
||||
|
||||
```bash
|
||||
sed 's/[^[:print:]\t]//g' script.sh > cleaned_script.sh
|
||||
```
|
||||
|
||||
## Network Manager
|
||||
|
||||
Check Status
|
||||
|
||||
```
|
||||
pacman -S networkmanager
|
||||
systemctl status NetworkManager
|
||||
```
|
||||
|
||||
```bash
|
||||
nmcli dev status
|
||||
nmcli radio wifi
|
||||
```
|
||||
|
||||
```bash
|
||||
nmcli radio wifi on
|
||||
```
|
||||
|
||||
```bash
|
||||
nmcli dev wifi list
|
||||
```
|
||||
|
||||
```bash
|
||||
nmcli dev wifi connect network-ssid
|
||||
```
|
||||
|
||||
```bash
|
||||
nmcli dev wifi connect network-ssid password "network-password"
|
||||
|
||||
# with password promot
|
||||
nmcli dev wifi connect network-ssid password "network-password"
|
||||
|
||||
```
|
||||
|
||||
```
|
||||
nmcli con show
|
||||
```
|
||||
|
||||
```
|
||||
nmcli con down ssid/uuid
|
||||
nmcli con up ssid/uuid
|
||||
```
|
||||
|
||||
```
|
||||
ip link set eno1 up
|
||||
```
|
||||
|
||||
### DHCP Client
|
||||
|
||||
```
|
||||
pacman -S dhclient dhcpcd
|
||||
```
|
||||
|
||||
Turn dchp on for the interface
|
||||
|
||||
```
|
||||
dhclient eth0 -v
|
||||
```
|
||||
|
||||
|
||||
### Create file
|
||||
|
||||
```bash
|
||||
cat > filename <<- "EOF"
|
||||
file contents
|
||||
more contents
|
||||
EOF
|
||||
```
|
||||
|
||||
|
||||
### Get data about file include number of links
|
||||
|
||||
```bash
|
||||
stat f1
|
||||
```
|
||||
|
||||
### File decryption
|
||||
|
||||
```bash
|
||||
openssl aes256 -md sha256 -d -in file.enc.zip -out file.zip -pass pass:"<password>"
|
||||
```
|
||||
|
||||
|
||||
### Base64
|
||||
|
||||
```bash
|
||||
openssl base64 -in qrcode.png -out qrcode.png.base64
|
||||
openssl base64 -in qrcode.png
|
||||
```
|
||||
|
||||
|
||||
### tar.xz
|
||||
|
||||
```
|
||||
tar -xJf file.tar.xz -C destination
|
||||
```
|
||||
|
||||
|
||||
## Execute command
|
||||
|
||||
Execute `ls` for each each object in current directory that starts from `D` or `M`
|
||||
|
||||
```
|
||||
ls {D*,M*}
|
||||
```
|
||||
|
||||
Utworzenie dwóch katalogów `test_a`, `test_b`
|
||||
|
||||
```
|
||||
mkdir test_{a,b}
|
||||
```
|
||||
|
||||
### copy content of directory and merge it. Dereference links
|
||||
|
||||
```
|
||||
cp -LTr /form/ .
|
||||
```
|
||||
|
||||
## JSON Linux apis
|
||||
|
||||
```
|
||||
tree -J
|
||||
ls -l | jq -R -s -c 'split("\n")[:-1]'
|
||||
```
|
||||
|
||||
|
||||
### List dependencies
|
||||
|
||||
```bash
|
||||
pacman -Sy lld
|
||||
llvm-nm
|
||||
```
|
||||
|
||||
### Find location of executable
|
||||
|
||||
```
|
||||
type -a python
|
||||
```
|
||||
|
||||
### Reload each file save
|
||||
|
||||
```bash
|
||||
brew install fswatch
|
||||
fswatch -o . --exclude "\.build.*$" | xargs -n1 -I{} your-command
|
||||
```
|
||||
|
||||
|
||||
## Add capabilities
|
||||
allow all to open 443 port
|
||||
|
||||
```bash
|
||||
sudo setcap 'cap_net_bind_service=+ep' ./service
|
||||
```
|
||||
|
||||
|
||||
# Test speed of the drive
|
||||
|
||||
```
|
||||
sudo hdparam -t --direct /dev/mmcblk0
|
||||
```
|
||||
12
utils/regex.md
Normal file
12
utils/regex.md
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
---
|
||||
layout: default
|
||||
title: Regex - notes
|
||||
---
|
||||
|
||||
How to match “any character” in the regular expression
|
||||
|
||||
- `.` → any char except newline
|
||||
- `\.` → the actual dot character
|
||||
- `.?` = `.{0,1}` → match any char except newline zero or one times
|
||||
- `.*` = `.{0,}` → match any char except newline zero or more times
|
||||
- `.+` = `.{1,}` → match any char except newline one or more times
|
||||
372
utils/vim.md
Normal file
372
utils/vim.md
Normal file
|
|
@ -0,0 +1,372 @@
|
|||
---
|
||||
layout: default
|
||||
title: Vim notes
|
||||
categories: software
|
||||
---
|
||||
|
||||
#### Symbols and meanings
|
||||
- `%` → current file. An example: `:so %` → Source the current file
|
||||
- `$` → end of line
|
||||
- `.` → Current line An example: `:.!sh` → Pipe current line to `sh` and replace it with the output
|
||||
|
||||
Entering `!!` in normal mode is translated to `:.!` I. e. Typing `!!date` in normal mode replaces current line with the date.
|
||||
|
||||
#### Tips
|
||||
|
||||
- `:e[dit]` → Edit the current file. This is useful to re-edit the current file, when it has been changed outside of Vim. `:e!` Force reload file
|
||||
- `:help index` → Get all default mappings
|
||||
|
||||
#### Navigation
|
||||
|
||||
- `h` `j` `k` `l` → left, down, up, right
|
||||
- `*` → Next whole word under cursor (previous `#`)
|
||||
- `e` → Forward to the end of word. `E` can contain punctuation
|
||||
- `w` → Move forward to the beginning of a word. `W` Same as `w`, but special characters are treated as part of a word.
|
||||
- `b` → Works as `w`, but backwards
|
||||
- `{`,`}` → Jump by paragraphs
|
||||
- `(`,`)` → Jump by sentences
|
||||
- `G` → Jump to the end of the file
|
||||
- `1G` → Jump to the beginning of the file (same as `gg`)
|
||||
- `50G` → Jump to line 50
|
||||
- `0` → Beginning of line
|
||||
- `_` or `^` → first non-blank character of the line
|
||||
- `g_` → last non-blank character of the line
|
||||
- `fX` → next character `X`. `FX` previous. `;` repeat , `,` repeat in reverse
|
||||
- `tX` → tili next `X` (similar to above, but the cursor is before `X`)
|
||||
- `H` → Jump to the top of the screen
|
||||
- `M` → Jump to the middle of the screen
|
||||
- `L` → Jump to the bottom of the screen
|
||||
|
||||
#### Scrolling
|
||||
|
||||
* `10 <PageUp>` or `10<CTRL-B>` → Move 10 pages up
|
||||
* `5 <PageDown>` or `5<CTRL-F>` → Move 5 pages down.
|
||||
- `zz` → scroll the line with the cursor to the center of the screen
|
||||
- `zt` → to the top
|
||||
- `zb` → to the bottom
|
||||
|
||||
### Terminal buffers
|
||||
|
||||
- `:te[rm[inal]] command`
|
||||
- `:b#` switch buffer
|
||||
- `:ls` list buffers
|
||||
- `:buff 1` or `:b1` switch to buffer 1
|
||||
|
||||
### List of the commands
|
||||
|
||||
Common meaning of letters in the commands
|
||||
- `w` → word
|
||||
- `i` → inner
|
||||
|
||||
| Command | |
|
||||
| ---: | :--- |
|
||||
| `dd` | Delete one line |
|
||||
| `d` | Delete selection |
|
||||
| `x` | Delete character under cursor |
|
||||
| `d+` | Delete 2 lines |
|
||||
| `:%d` or :`1,$d` | Delete the whole of the file |
|
||||
| `dw`, `diw` | Delete what that the cursor is over |
|
||||
| `di(` | Delete inner brackets. `da(` → including brackets |
|
||||
| `:r[ead] !date` | Execute commend and put content into editor |
|
||||
| `.` | Repeat the last operation |
|
||||
| `gU` | Uppercase the selection, `gu` → lower |
|
||||
| `%` | Jump to matching bracket `{ }` `[ ]` `( )` |
|
||||
| `:%!column -t` | Put text in columns |
|
||||
| `:%!sort` | Sort the whole file |
|
||||
| `:'<,'>!grep text` | Keep lines that contains `text` |
|
||||
| `:'<,'>!sort` | Sort selected lines |
|
||||
| `:eariler 1m` | State from the 1 min before |
|
||||
| `ga` | Display hex, ascii value of character under cursor |
|
||||
| `g8 ` | Display hex value of utf-8 character under cursor |
|
||||
| `ciw` | Change inner word |
|
||||
| `yiw` | Yank inner word |
|
||||
| `viwp` | Select word and then replace it with previously yanked text |
|
||||
| `rX` | replace every character in selection or under cursor with `X` |
|
||||
| `guiw` | Lower case word |
|
||||
| `guu` | Lowercase line |
|
||||
| `gUU` | Uppercase line |
|
||||
| `=` | Indent the selection |
|
||||
| `=%` | Indent the current braces |
|
||||
| `G=gg` | indent entire document |
|
||||
| `ZZ` | Write current file, if modified, and exit (same as `:wq`) |
|
||||
| `ZQ` | Quit current file and exit (same as `:q!`) |
|
||||
| `:so %` | Source current file |
|
||||
| `@:` | Execute last command again |
|
||||
|
||||
#### Status line
|
||||
|
||||
```vim
|
||||
:set statusline=%<%f%h%m%r%=%b\ 0x%B\ \ %l,%c%V\ %P
|
||||
```
|
||||
|
||||
#### Visual Mode
|
||||
|
||||
- `V` → Selection by lines
|
||||
- `v` → Selection follows the cursor
|
||||
- `Ctrl+v` → Block selection
|
||||
- When selected block you can applay changes to each line by typing `I` editing and finally pressing `Esc`
|
||||
|
||||
#### Enter Insert Mode
|
||||
|
||||
- `I` → At the first non white character of the line
|
||||
- `i` → On the left of the cursor
|
||||
- `A` → At the very end of the line
|
||||
- `a` → On the right of the cursor
|
||||
- `c` → Delete selection and enter insert mode
|
||||
- `o` → Create new line below and enter insert mode
|
||||
- `O` → Create new line above and enter insert mode
|
||||
|
||||
#### Split the editor
|
||||
|
||||
- `:sp <filename>` → Vertically
|
||||
- `:vs <filename>` → Horizontally
|
||||
- `:set splitbelow`, `:set splitright`
|
||||
|
||||
#### Markers
|
||||
|
||||
- `:marks` → list of marks
|
||||
- `ma` → set current position for mark `a`
|
||||
- `` `a`` → jump to the cursor position of mark `a`
|
||||
- `'a` → jump to the beginning of a line of a mark `a`
|
||||
- ``y`a`` → yank text to position of mark `a`
|
||||
* ``` `` ``` → Return to the cursor position before the latest jump
|
||||
* `` `.`` → Jump to the last changed line.
|
||||
|
||||
### Recording macros
|
||||
|
||||
1. `qa` → Start recording macro under letter `a`
|
||||
2. `q` → Stop recording
|
||||
3. `@a` → Play the macro saved under letter a
|
||||
4. `@@` → Play the last macro
|
||||
|
||||
#### Searching
|
||||
|
||||
- `:%s/Plug.*$//` → Search and delete all lines that starts from Plug
|
||||
- `:%s/foo/bar/gc` → Replace all occurrence of foo by bar with confirmation
|
||||
- `'<,'>:s/find/replacewith/` Replace selection
|
||||
- `/pattern` → search for pattern then enter and `n` next `N` previous match
|
||||
- `?pattern` → search backward for pattern
|
||||
|
||||
### Registers
|
||||
|
||||
- `:reg` → print all registers
|
||||
- `"ap` → paste the register `a` , if the macro is recorded then it will paste it
|
||||
- `"xy` → yank into register `x`
|
||||
- `:let @a = "kkll"` → set a macro from the command mode
|
||||
- `:let @A='i'` → append to register `a`
|
||||
- `:%normal @a` → execute the macro on all lines of the current file
|
||||
- `:'<,'>normal @a` → execute the macro on a visually selected lines
|
||||
- `:10,20 normal @a` → execute the macro for lines from 10 to 20
|
||||
- `:g/pattern/ normal @a` → Search for pattern and execute macro for it
|
||||
|
||||
#### Functions - An example
|
||||
|
||||
Function definition
|
||||
|
||||
```vim
|
||||
function! CalculateAge()
|
||||
normal 03wdei^R=2012-^R"^M^[0j
|
||||
endfunction
|
||||
```
|
||||
|
||||
Key banding to function
|
||||
|
||||
```vim
|
||||
nnoremap <leader>a :call CalculateAge()<CR>
|
||||
```
|
||||
|
||||
Preloading vim with macros like
|
||||
|
||||
```vim
|
||||
let @a='03wdei^R=2012-^R"^M^[0j'
|
||||
```
|
||||
|
||||
Call function from the command mode
|
||||
|
||||
```
|
||||
:call CalculateAge()
|
||||
```
|
||||
|
||||
#### Configuration
|
||||
|
||||
The config file is located at `.config/nvim/init.vim`
|
||||
|
||||
```vim
|
||||
if empty(glob('~/.local/share/nvim/site/autoload/plug.vim'))
|
||||
silent !curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs
|
||||
\ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
|
||||
autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
|
||||
endif
|
||||
|
||||
call plug#begin('~/.vim/plugged')
|
||||
|
||||
Plug 'junegunn/fzf'
|
||||
|
||||
Plug 'neovim/nvim-lspconfig'
|
||||
Plug 'neoclide/coc.nvim', {'branch': 'release'}
|
||||
|
||||
Plug 'vim-airline/vim-airline'
|
||||
Plug 'vim-airline/vim-airline-themes'
|
||||
|
||||
Plug 'vim-syntastic/syntastic'
|
||||
Plug 'tokorom/syntastic-swiftlint.vim'
|
||||
|
||||
call plug#end()
|
||||
```
|
||||
|
||||
- `set relativenumber`
|
||||
- `set encoding=utf-8`
|
||||
- `syntax on`
|
||||
- `map za :FZF<CR>` → fuzzy finder over `za`
|
||||
|
||||
Indentation setup
|
||||
|
||||
- `set tabstop=2 shiftwidth=2 expandtab`
|
||||
- `filetype plugin indent on`
|
||||
|
||||
```vim
|
||||
let g:syntastic_swift_checkers = ['swiftlint', 'swiftpm']
|
||||
lua << EOF
|
||||
local lspconfig = require('lspconfig')
|
||||
lspconfig.sourcekit.setup{}
|
||||
EOF
|
||||
```
|
||||
|
||||
#### Rename current file
|
||||
|
||||
|
||||
```vim
|
||||
|
||||
function! RenameFile()
|
||||
let old_name = expand('%')
|
||||
let new_name = input('New file name: ', expand('%'), 'file')
|
||||
if new_name != '' && new_name != old_name
|
||||
exec ':saveas ' . new_name
|
||||
exec ':silent !rm ' . old_name
|
||||
exec ':bd ' . old_file
|
||||
redraw!
|
||||
endif
|
||||
endfunction
|
||||
map <leader>n :call RenameFile()<cr>
|
||||
```
|
||||
|
||||
|
||||
|
||||
<!--
|
||||
### Navigation in Vimr
|
||||
- jump to the next empty line (the next paragraph)`}`
|
||||
* Recording macros
|
||||
* `"xp` pastes the contents of the register `x`.
|
||||
|
||||
|
||||
* `~ ` : invert case (upper->lower; lower->upper) of current character
|
||||
* `gf ` : open file name under cursor (SUPER)
|
||||
|
||||
* `ggg?G` : rot13 whole file
|
||||
* `xp` : swap next two characters around
|
||||
* `CTRL-A,CTRL-X` : increment, decrement next number on same line as the cursor
|
||||
* `CTRL-R=5*5` : insert 25 into text
|
||||
|
||||
|
||||
|
||||
* `'.` : jump to last modification line (SUPER)
|
||||
* *`.* : jump to exact spot in last modification line
|
||||
* `<C-O>` : retrace your movements in file (backward)
|
||||
* `<C-I>` : retrace your movements in file (forward)
|
||||
* `:ju(mps)` : list of your movements {{help|jump-motions}}
|
||||
:history : list of all your commands
|
||||
|
||||
|
||||
Sorting with external sort
|
||||
:%!sort -u : contents of the current file is sorted and only unique lines are kept
|
||||
:'v,'w!sort : sort from line marked v thru lines marked w
|
||||
:g/^$/;,/^$/-1!sort : sort each block (note the crucial ;)
|
||||
|
||||
!1} sort : sorts paragraph; this is issued from normal mode!)
|
||||
|
||||
:wn : write file and move to next (SUPER)
|
||||
:bd : remove file from buffer list (SUPER)
|
||||
:sav php.html : Save current file as php.html and "move" to php.html
|
||||
:w /some/path/%:r : save file in another directory, but with the same name
|
||||
:e # : edit alternative file
|
||||
:args : display argument list
|
||||
:n : next file in argument list
|
||||
:prev : previous file in argument list
|
||||
:rew : rewind to first file in argument list
|
||||
:ls : display buffer list
|
||||
:bn : next buffer
|
||||
:bp : previous buffer
|
||||
:brew : rewind to first buffer in buffer list
|
||||
:tabe : open new tab page (Ctrl-PgUp, Ctrl-PgDown for next/previous tab)
|
||||
:tabm n : move tab to position n (0=leftmost position)
|
||||
|
||||
# editing a register/recording
|
||||
"ap
|
||||
<you can now see register contents, edit as required>
|
||||
"add
|
||||
@a
|
||||
|
||||
|
||||
|
||||
|
||||
Ctrl-D move half-page down
|
||||
Ctrl-U move half-page up
|
||||
Ctrl-B page up
|
||||
Ctrl-F page down
|
||||
Ctrl-O jump to last (older) cursor position
|
||||
Ctrl-I jump to next cursor position (after Ctrl-O)
|
||||
Ctrl-Y move view pane up
|
||||
Ctrl-E move view pane down
|
||||
|
||||
n next matching search pattern
|
||||
N previous matching search pattern
|
||||
|
||||
|
||||
g* next matching search (not whole word) pattern under cursor
|
||||
g# previous matching search (not whole word) pattern under cursor
|
||||
|
||||
de — Delete to the end of the word
|
||||
^R= — Insert the contents of the special = register, which accepts an expression to evaluate
|
||||
|
||||
gUgn - uppercase
|
||||
gn
|
||||
n move to the next match
|
||||
|
||||
|
||||
Undo and redo
|
||||
|
||||
You can use u to undo the last change. CTRL-R redoes a change that has been undone. U returns the current line to its original state.
|
||||
You can use g- or g+ to go between text-states.
|
||||
Search and replace
|
||||
* `\vpattern` - 'very magic' pattern: non-alphanumeric characters are interpreted as special regex symbols (no escaping needed)
|
||||
* `n` - repeat search in same direction
|
||||
* `N` - repeat search in opposite direction
|
||||
|
||||
* `:noh` - remove highlighting of search matches
|
||||
Search in multiple files
|
||||
* `:vimgrep /pattern/ {file}` - search for pattern in multiple files
|
||||
|
||||
* e.g. `:vimgrep /foo/ **/*`
|
||||
* `:cn` - jump to the next match
|
||||
* `:cp` - jump to the previous match
|
||||
* `:copen` - open a window containing the list of matches
|
||||
|
||||
|
||||
folding from selection
|
||||
`: '<,'>fo`
|
||||
|
||||
`:help folding`
|
||||
|
||||
set foldmethod=syntax
|
||||
`set foldlevel=1`
|
||||
`set foldclose=all`
|
||||
|
||||
|
||||
Sequence forfolding lines `Shift+V:fo`
|
||||
`:set foldmethod=syntax` intent,
|
||||
`zo` unfolding
|
||||
`za` toogle folding
|
||||
`zf#j` creates a fold from the cursor down # lines.
|
||||
|
||||
:CheckHealth
|
||||
-->
|
||||
Loading…
Add table
Add a link
Reference in a new issue