10.2.5 Other Useful Variables

There are many other variables which you can set in your .profile or.cshrc files. For a complete list, refer to the man Pages(1): User Commands. The following are a few brief descriptions of some of the more commonly used options.

Use set noclobber to prevent unintentional overwriting of files when you use the cp command to copy a file. This variable affects the C shell only. Enter the following in your .cshrc file:

set noclobber

Use set history to set the number of commands saved in your history list. The history command is useful to view commands you have previously entered. The history file can also be used to repeat earlier commands. This variable affects the C shell only. Enter the following in your .cshrc file:

set history=100

You can also affect the Bourne and Korn shells in the same manner by placing the following in your .profile file:

HISTORY=100