Users, Groups, And Permissions In Linux

User Manipulation

To add a user called bart:

Group Manipulation

To add a pre-existing user called bart to the group simpsons:


File and directory permissions are set in Linux with pe

chmod is the default UNIX tool for modifying file and directory permissions.

Group Permissions

To allow anyone in the same group to read, write or execute files (only files which are currently executable by a user), as well as allow them to read contents of all sub-directories:

To change permissions recursively on a group of files, use:

Using a capital X instead of a lower-case x results in the executable bit only being set if the file is a directory or the executable bit is already set for some user. This is useful when applying changes to multiple files (using the recursive option -R), as you usually don’t want to make things such as text files executable!

Posted: July 5th, 2018 at 8:23 am
Last Updated on: July 5th, 2018 at 12:22 pm