LinuxCommandLibrary

Users & Groups

Create group

$ groupadd [name]

$ addgroup [name]

Delete group

$ groupdel [name]

Rename group

$ groupmod -n [newGroupname] [oldGroupname]

Create user

$ useradd [name]

$ adduser [name]

Delete user

$ userdel [name]

$ deluser [name]

Rename user

$ usermod -l [newUsername] [oldUsername]

Set user password

$ passwd [name]

Grant sudo privileges to an existing user

$ usermod -a -G sudo [user]

$ adduser [user] sudo

User information

$ finger [user]

Add existing user to group

$ usermod -aG [groupName] [userName]

$ adduser [userName] [groupName]

$ gpasswd -a [userName] [groupName]

Add new user to group

$ useradd -G [group] [user]

Remove user from group

$ gpasswd -d [user] [group]

$ deluser [user] [group]

List all groups

$ getent group

$ cat /etc/group

List all users

$ getent passwd

$ cat /etc/passwd