from the time the bash shell and tcsh shells are started, they begin maintaining a history list of commands you enter. some csh shells do not keep track of the commands you enter unless you erquest it. if you want to see a history of the commands you have entered before you can run the history command:

history

and once you enter this command, you will see a list of all the command you had entered before. but how about if you just want the last ten, ok, just run this command

history 10