User And Group Management In Linux

All of you have been told about group and user management in this tutorial. and learn how to add group and user very easy steps. follow steps carefully and lets try now.

Three type are users in redhat

• Admin user (Root)
• Normal user (Created by manually)
• System user (automatic login by system )

User management

How to user add in redhat

[root@localhost ~]#useradd vishal

How to create password for vishal user

[root@localhost ~]#passwd vishal

How to delete password of any user

[root@localhost ~]#passwd -d vishal

How to delete any user in redhat

[root@localhost ~]#userdel -r vishal

How to check user information in redhat

[root@localhost ~]#cat /etc/passwd

How to check password information in redhat

[root@localhost ~]#cat /etc/shadow

How to check login user information in redhat

[root@localhost ~]#who -a

output

                     user name /  terminal no(tty)/     time date/  login id no.
                           root                 tty1                    20.02.2020     2242
                          vishal               tty2                    20.02.2020     2525

How to kick out login user in redhat

remove vishal user
[root@localhost ~]#kill 2525 

Group management

How to create a group in redhat

[root@localhost ~]#groupadd guruvishal

How to check group create or not

[root@localhost ~]#cat /etc/group

How to delete a group in redhat

[root@localhost ~]# groupdel guruvishal

How to add user in group

[root@localhost ~]# usermod -G guruvishal vishal

How to remove user in group

[root@localhost ~]# gpasswd -d vishal guruvishal

( d – for delete )