What are common user management commands?

Common user management commands in Linux include:

1. Add a User:

   sudo useradd username

2. Delete a User:

   sudo userdel username

3. Modify a User:

   • Change username:

     sudo usermod -l new_username old_username

   • Change home directory:

     sudo usermod -d /new/home/directory -m username

   • Add user to supplementary groups:

     sudo usermod -aG groupname username

   • Change login shell:

     sudo usermod -s /path/to/shell username

   • Set account expiration date:

     sudo usermod -e YYYY-MM-DD username

4. View User Information:

   • Display user ID and group ID:

     id username

   • View password aging information:

     chage -l username

5. List All Users:

   cat /etc/passwd

These commands provide a comprehensive toolkit for managing user accounts and their attributes in a Linux environment.