SHELL

bash cheat sheet

Try https://devhints.io/bash (DevHints.io - useful resource)

bash script cheat sheet

cat file.txt | while read line; do
  echo $line
done

bash shell scripting cheat sheet

set -euo pipefail
IFS=$'
	'

shell scripting cheat sheet

shopt -s nullglob    # Non-matching globs are removed  ('*.foo' => '')
shopt -s failglob    # Non-matching globs throw errors
shopt -s nocaseglob  # Case insensitive globs
shopt -s dotglob     # Wildcards match dotfiles ("*.sh" => ".foo.sh")
shopt -s globstar    # Allow ** for recursive matches ('lib/**/*.rb' => 'lib/a/b/c.rb')

bash cheat sheet

for i in /etc/rc.*; do
  echo $i
done