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USER MANAGEMENT

  • Take me to the Tutorial
  • In this lecture we will learn how to create and manage user accounts in Linux.

User Add

  • To create a new local user bob in the system use useradd command.

    [~]$ useradd bob
    
  • To get more details about bob account like, home director, uid, and shell use /etc/passwd

    [~]$ grep -i bob /etc/passwd
    bob:x:1002:1002::/home/bob:/bin/sh
    

    useradd

  • To check the uid or username of the user logged in user whoami command.

    [~]$ whoami
    bob
    
  • All user's password are store under /etc/shadow

    [~]$ grep -i bob /etc/shadow
    bob:!:18341:0:99999:7:::
    
  • To change the password of current user use passwd or for any specific user use passwd <username>

    [~]$ passwd bob
    Changing password for user bob.
    New UNIX password:
    Retype new UNIX password:
    passwd: all authentication tokens updated
    successfully.
    

Managing Users

  • useradd command be used along with many attributes as show below.

    [~]$ useradd -u 1009 -g 1009 -d /home/robert -s /bin/bash -c ”Mercury Project member" bob
    

    manage

  • To delete a user use userdel command

    [~]$ userdel bob
    
  • To add a group use groupadd command

    [~]$ groupadd –g 1011 developer
    
  • To delete a group user groupdel command

    [~]$ groupdel developer