Securely Remove Files
If you really want to make sure you have wiped a file from your hard drive,
you are going to want to use
srm instead of
rm. The man page for
gives the following description:
srm removes each specified file by overwriting, renaming, and truncating it before unlinking. This prevents other people from undeleting or recovering any information about the file from the command line.
h/t Dillon HaferTweet