Shell Scripting

Effective Shell is an ebook on shell scripting principles¹.

unix-shell-script-tactics is a shell style guide that lays out common script patterns.

ShellCheck is a linter for shell scripts.

dylanaraps/pure-sh-bible - A collection of pure POSIX sh alternatives to external processes.

Appending multiple lines to a file

tee -a FILE << EOF > /dev/null
echo "line 1"
echo "line 2"
EOF

Start custom scripts with ‘,’

If you create custom scripts in a PATH’d bin directory, prepend them with a , to keep them separate from the standard binaries and also allow easy access via tab completion².

Get path relative to script path

script_root = $(dirname $(realpath $0))

1. Kerr, D. Effective Shell. (2022).

2. Rhodes, B. Start all of your commands with a comma. https://rhodesmill.org/brandon/2009/commands-with-comma/?utm_medium=email (2009).