In most shells,
are an easy way to shorten a long command line or do a short series of
All except the oldest Bourne-type shells have
shell functions (
These are a cross between aliases and shell scripts.
They're good both for shortening command lines and for running a short or
long series of commands.
simulate shell functions (
on older Bourne shells.
These "fake functions" don't have much more power than aliases - but they're
better than nothing!