CLI tools list

https://dev.to/lissy93/cli-tools-you-cant-live-without-57f6

Shebang

#!/usr/bin/env bash

Check OS

Fetched from: https://github.com/billdeitrick/dotfiles/blob/master/scripts/symlink.fish

switch (uname)
    case Darwin
        set DOTFILE_SYMLINK_ROOT ~/Documents/dev/dotfiles
    case Linux
        set DOTFILE_SYMLINK_ROOT "/mnt/c/Users/$LOGNAME/dev/dotfiles"

        # WSL detection inspired by [https://stackoverflow.com/questions/38086185/how-to-check-if-a-program-is-run-in-bash-on-ubuntu-on-windows-and-not-just-plain](https://stackoverflow.com/questions/38086185/how-to-check-if-a-program-is-run-in-bash-on-ubuntu-on-windows-and-not-just-plain)
        if grep -qE "(Microsoft|WSL)" /proc/version
            set IS_SYMLINK_WSL 1
        else
            set IS_SYMLINK_WSL 0
        end
    case '*'
        echo "MY FISH DOESN'T KNOW THESE WATERS!"
        exit 1

end

Determine kernel arch

Stolen from an SO answer that stole it from the Helm init script

initArch() {
  ARCH=$(uname -m)
  case $ARCH in
    armv5*) ARCH="armv5";;
    armv6*) ARCH="armv6";;
    armv7*) ARCH="arm";;
    aarch64) ARCH="arm64";;
    x86) ARCH="386";;
    x86_64) ARCH="amd64";;
    i686) ARCH="386";;
    i386) ARCH="386";;
  esac
}

GNU Sed (Ubuntu) to find and replace with newlines

sed -i "s/ q /\nq /g" "VanMoof x EthicalOs.md"

BSD Sed (mac) to insert content at first line

sed -i '' '1i\

# Title
  

' 'filename.md'

fd -e "md" -x sed -i "" -E "s/(^| )(https?:[^ ]+)/\1[\2](\2)/g" {}

Random string of length 30

cat /dev/urandom | base64 | head -c 30

or in a mode that allows you to both see and pipe this:

`EMAIL=_____@vanmoof.com && PASS=$(cat /dev/urandom | base64 | head -c 30) && echo $PASS && aws iam create-login-profile --password-reset-required --user-name $EMAIL --password $PASS`

Command exists

if ! command -v lazygit &> /dev/null
then
	sudo eget -q --tag v0.31.3 --to=/usr/local/bin/ jesseduffield/lazygit --verify-sha256=78eff8d126178594a06107c8faff7f27343f4e63281d14fbbc62f6fbb38e5110
fi

File exists

if test -f "~/.ssh/id_rsa.pub"; then
  echo "Exists"
fi

Mass rename files

 find . -type f | sed -n 's/\(\(.*\)yt1s.com - \(.*\)\)/mv "\1" "\2\3"/p' | tee | bash

Curl with timing

First echo this into a file named curl-format.txt

     time_namelookup:  %{time_namelookup}s\n
        time_connect:  %{time_connect}s\n
     time_appconnect:  %{time_appconnect}s\n
    time_pretransfer:  %{time_pretransfer}s\n
       time_redirect:  %{time_redirect}s\n
  time_starttransfer:  %{time_starttransfer}s\n
                     ----------\n
          time_total:  %{time_total}s\n

Then:

curl --user-agent "tester-alex-papa-miro" -w "@curl-format.txt" -X GET --location -s -k -I "TARGET"

AWS IP lookup function

aws_lookup_ip() {
  if [ $# -lt 1 ]
  then
    echo "Usage: $funcstack[1] <IP or list of IPs separated by commas>"
    return
  fi

  QUERY_FMT="NetworkInterfaces[*].{ Type: InterfaceType, Description: Description, AZ: AvailabilityZone, PublicIP: Association.PublicIp, PrivateIP: PrivateIpAddress}"
  aws ec2 describe-network-interfaces --output table --query $QUERY_FMT --max-items 500 --filters "Name=addresses.private-ip-address,Values=$1"
  aws ec2 describe-network-interfaces --output table --query $QUERY_FMT --max-items 500 --filters "Name=association.public-ip,Values=$1"
}

Convert a bunch of 4k vids to lower res single threaded

fdfind --threads 1 --exec ffmpeg -i {/} -map_metadata 0 -vf scale=1920:1080 -c:a copy {/.}_1080.mp4

SSH keygen

Originally fetched from: https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

ssh-keygen -t ed25519 -C "your_email@example.com"

Dropship ssh key into authorized_keys

cat ~/.ssh/id_ed25519.pub | ssh USER@HOST "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

shorter form if you’re sure that authorized_keys exists and has correct permissions:

cat ~/.ssh/id_ed25519.pub | ssh USER@HOST "cat >> ~/.ssh/authorized_keys"