Safeguarding your files

It's easy to overwrite (clobber) existing files when you are redirecting output to a file. To prevent this from happening you need to set the noclobber shell variable by adding a line to your shell start-up file.

Depending on which shell you are using this is:

C shell

set noclobber

TC shell

set noclobber

Korn shell

set -o noclobber

BASH

set noclobber