To remove a file use the rm command:
rm [options] filename
To remove a file you need only have write permission on the directory
that contains the file, write permission on the file itself is not
necessary. If you wish to remove a file that has write protection, a
warning message asking you to confirm deletion will appear, but you are
allowed to delete the file. To delete a file that exists in a write-protected
directory, you must change the protection mode of the directory
first.
To prevent accidental file removal, the -i option should be used. This will cause rm to ask you if you really wish to delete the file. Remember, once a file is removed, it can not be recovered. You may wish to alias rm to 'rm -i' and cp to 'cp -i' and mv to 'mv -i'. More information on the alias command can be found in the section titles ''Unix C Shell Interface'' under Shell Commands.