Advanced commands for Linux user groups and user groups

1. User lock: Passwd-l user1

2. Unlock User: Passwd-u user1

3. User no Password registration: passwd-d user1

4. Add to the secondary user group: Gpasswd-a user1 boss (group name)
Remove user to Secondary user group: Gpasswd-d user1 boss


5. Switch to the Boss user group: Newgrp boss (after User1 login), you may want to enter a user group.

6. Add users to the main user group and to the secondary user group:
Useradd-g group01-g GROUP02,GROUP03

7. Group user group plus password: gpasswd newpasswd renewpasswd

8. Switch user's identity: Su username or su after the user name, that is, the switch user name.

9 Current Login user name: WhoAmI

ID + username. Indicates that the specified user information, including user number, user name, is displayed. Primary group number and name, subordinate group list.

Groups + Username. Displays all groups for that user.

Advanced commands for Linux user groups and user groups