about write down a command-line to see the help text that matches each argument EXPLAIN (new! command substitution and control flows support) :(){ :|:& };: for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l 2>/dev/null; done file=$(echo `basename "$file"`) true && { echo success; } || { echo failed; } cut -d ' ' -f 1 /var/log/apache2/access_logs | uniq -c | sort -n tar zcf - some-dir | ssh some-server "cd /; tar xvzf -" tar xzvf archive.tar.gz find . -type f -print0 ssh -i keyfile -f -N -L 1234:www.google.com:80 host git log --graph --abbrev-commit --pretty=oneline origin..mybranch ...