"In addition to creating programming structures, you
can also use the semi-colon to separate stand-alone commands that
you want to execute from the same command entry. If you wanted to
cd to a certain directory and then look at its contents, you could
enter each command on its own line. Or, you could enter them both
on the same line. This process is called command chaining.
backups crash lib lock mail run tmp yp
cache games local log opt spool www
"You can also instruct bash to only execute the second command
if the first command successfully completes. Just separate the
commands with an "&&" instead of with a semi-colon."