usermod - modify a user account
syntax $ usermod [options] username
To add Information to user account $ sudo usermod -c "This is test message" user1
To change user home directory $ sudo usermod -d /home/user3/ user2
To set user account expiry date $ sudo usermod -e 2025-04-04 user3
To change user primary group $ sudo usermod -g devops user4
To add group to an existing user $ sudo usermod -G web user5
To add supplementary and primary group to user $ sudo usermod -aG wheel user6
To change user login name $ sudo usermod -l new_username old_username $ sudo usermod -l user7 user6
To lock user account $ sudo usermod -L user7
To unlock user account $ sudo usermod -U user7
To move user home directory to new location from /home/user7 to /var/user7 $ sudo usermod -d /var/user7/ -m user7
To create unencrypted password for user $ sudo usermod -p passcode123 user7
To change user shell $ sudo usermod -s /bin/sh user1
To change user ID $ sudo usermod -u 666 user2
To modify the UID and GID. $ sudo usermod -u 555 -g 665 user3
regards, T.Dhanasekar