CentOS is enterprise level Linux distribution which is clone of the RedHat. User management like create, add, remove etc is important part of the daily Administration tasks. In this tutorial we will look how to add new user to the CentOS system.
List Current Users
Before creating new user we will list existing users. We can use different methods to list existing users but following is the most practical way to list existing users. We will cat user names with the
$ cut -f 1 -d : /etc/passwd
Add New User with useradd
Now we can add our new user. We have all ready checked the existing users but if we try to add existing user we will files. We will use
useradd command by providing the user name. In this example the user name will be
$ useradd poftut
Add User To The Sudoers
Newly added user will have its own group and will not added to the other groups.
Sudoers is a special mechanism which group name is
wheel . Sudoers can run commands with administrator or root privileges. We can add newly created user to the Sudoers with
usermod command. We will add user
poftut to the
wheel group which is Sudoers group.
$ usermod -aG wheel poftut
List Wheel Group or Sudoers Users
We can list current
wheel group user members with the following command.
$ cat /etc/group
Change Shell To New User
We can practically change shell to the newly created user with the
su command. In this example we will change to the user
poftut like below.
$ su - poftut