Linux Users and Groups Management

Create new User

# adduser [userName]

Note: adduser is a Perl script the helps you tu create the user itselfs and setup their personal informations.

Delete User

# userdel [-r] [userName]

Note: If -r arg was passed, userdel will remove the [userName] home directory

Add existing user to a existing group:

# usermod -a -G [group1[,group2...]] [user]

Remove user from a group

# gpasswd -d [user] [group]