up arrow = <CTRL-P> shows last command
down arrow = <CTRL-N> brings one command up
<CTRL-A> takes the cursor all the way to the front of your current command
<CTRL-E> takes the cursor all the way to the end of your current command
left arrow = <CTRL-B> move backward character
right arrow = <CTRL-F> move forward character
Backspace = <CTRL-D> delete one character
<ESC-B> moves back one word
<ESC-F> moves forward one word
Change History:
R1(config)#line con 0
R1(config-line)#history size 20