bash -c

• https://stackoverflow.com/questions/20858381/what-does-bash-c-do

-c string.             If the -c option is present, then commands are read from string. If there are arguments after the string, they are assigned to the positional parameters, starting with $0.

DIR="YOUR_DIR" bash -c 'tar c "$DIR" | xz -T0 -c > "$DIR".tar.xz && ls -lh "$DIR".tar.xz'

• Homebrew installation: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Related

• bash -e
• bash -x
• bash -xe
• bash -i
• bash --rcfile .mybashrc -ci 'echo $FOO'
• sh -c
• bash --login

See also

• command, bash -c
• Bash [ -c ], alias, &&, Bash history, Autocompletion, set, unset, export, .bash_aliases, .bashrc and .bash profile, PS1, echo, brace expansion, Function, shopt, trap, set -e, source, PATH, complete, disown, .hushlogin, .bashrc, builtin, eval, set, $PATH, $HOME, TZ, .profile, -e, -i, Builtin (Bash), mapfile, ~, return (Bash), for, until, declare, dirname, basename, functions.sh, Bash arithmetic expansion, shift, bash --rcfile, readonly, $1, $@