$ 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