Bash

Check out the Bash snippets page for small bits of Bash to help you write scripts & use the shell.

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Bash Cheat Sheet

A table of common commands & variables I use.

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Command	Example	Description
pwd	pwd # /path/where/shell/is	The current working directory, i.e. 'this path' where your shell is.
$CWD	CWD=$(pwd) && echo "$CWD"	Create a variable $CWD, which is your current working directory (the path where you shell is).
$THIS_DIR	THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"	A variable with the path where a script that is called exists. Different from $CWD. Where $CWD is the path the shell was called from, $THIS_DIR is the actual path to the script that is being executed where the variable is declared.
mkdir -p	mkdir -p ~/path/that/does-not/exist	Create a nested directory path where some or all of the parents do not exist yet. Use -pv to show verbose output.
exec $SHELL	exec $SHELL	Reload the current shell. Useful after modifying auto-sourced files like ~/.bashrc. Equivalent to ~/.bashrc and source ~/.bashrc.
while true; do <something>; done	while true; do echo "Loop!" && sleep 2; done	Loop/repeat a command or phrase until you cancel the command with CTRL-D or CTRL-C, or the loop finishes, exits, or errors.