rm.1fun -rf
remove files
-r     Recursive remove.  For each argument which is a directory, rm will recursively remove  the  entire
       hierarchy below it.  If this was successful, the directory itself is removed.
-f     Forced  remove.   Unwritable  files are removed without rm asking permission.  By default, rm will
       ask permission before removing unwritable files.
source manpages: rm