alias'''Alias:'''
assigns a new name to an existing utility
eg. ''Example:'' <span style="font-family:courier;font-weight:bold;>alias</span> (Alias command without an argument will display all the aliases currently set)eg. ''Other Examples:'' <span style="font-family:courier;font-weight:bold;>alias dir=lseg. <br>alias ls='ls -al'eg. <br>alias clearfile='cat /dev/null >'</span>can be useful, but can also make your scripts crypticyour scripts won't be useable by others, unless they use the same aliases
!num - re-execute command number "num"
!xxx - re-execute last command beginning with string "xxx"
=INVESTIGATION 1: LINKING FILES=