Try chmod
The best way to see what chmod does is to go to a
Linux system and start using it. If you don’t have a Linux system close
at hand, or don’t feel confident working with real files,
the form below will let you test the chmod command.
Note: the form will only accept the "*" at the end of a filename
as a wildcard. The
Reset button will set the file permissions as they were
when you first entered the page.
The Help button will pop up a quick reference.
Type command here:
Errors: