In the C Shell, I saw some people can push the old history by the UP/DOWN
2 ls -l
When they pressed the UP ARROW, the command line will display the 'pwd'. If
they press it again, it will change to 'ls -l'. Of course, the command line
will display 'pwd' again if I press DOWN ARROW. This feature is quite
similar the DOSKEY in DOS. Is there anyone know how to setup this thing in
the UNIX. Thanks!