To create a simple alias: alias del='rm -i' del memo.txt rm: remove memeo.txt? y . This creates the alias del for the command rm -i which prompts you for confirmation that you want to remove a file before it does so. ... To create a command alias that consists of several commands: alias what='ps -aux | ... To refer to another command alias within an alias: alias h=history alias rev='h | ... To use more than one alias on the same command line: alias root='cd /; ' alias slist='ls -l | ...