alias
With alias, you can define abbreviations for longer command
lines. As arguments, give an alias name and an expansion (a command line
which the name will stand for). If the expansion contains spaces,
enclose it in double quotes. Use set alias name to delete
alias name.
If you type the name of an alias at your command line, its expansion will be executed. The character sequence %a in your alias definition will be replaced by what follows the alias name in the command line.
Aliases cannot be nested.