[root@linuxserver ~]# useradd stone [root@linuxserver ~]# passwd stone Changing password for user stone. New password: BAD PASSWORD: it is too simplistic/systematic BAD PASSWORD: is too simple Retype new password: passwd: all authentication tokens updated successfully. [root@linuxserver ~]# su - stone [stone@linuxserver ~]$ su - Password: [root@linuxserver ~]# userdel -r stone userdel: user stone is currently logged in [root@linuxserver ~]# logout [stone@linuxserver ~]$ logout [root@linuxserver ~]# userdel -r stone