Some Bash Tips..

Reading another forum someone pointed this out what a great find a few in here I could see myself using.

http://www.deadman.org/bash.html

Just a few snippets
history => returns a list now you can use the number
!N => where N is the number

Wish to rerun that command
!!

Wish to change that command slightly because of a typo
command that/went/wrong
^wrong^right => Now executes the previous command replacing wrong with right

cp filename filename-old
Now becomes
cp filename{,-old}

Read on been an eye opener for me, see some useful ones in here.