Initial Settings : Add Common Users2019/09/25 |
| [1] | To add a common user account on CentOS Server, Set like follows. |
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[root@localhost ~]# useradd centos [root@localhost ~]# passwd centos Changing password for user centos. New UNIX password: # input any password you'd like to set Retype new UNIX password: # confirm passwd: all authentication tokens updated successfully. |
| [2] | If you'd like to switch to root user account from a common user, use [su] command to do so. |
localhost login: centos # login username password: # input user password[centos@localhost ~]$ su - # swicth to root Password: # input root password [root@localhost ~]# # just switched to root |
| [3] | If you'd like to limit users to run [su] command, set like follows. On the example below, only users in [wheel] group can run [su] command. |
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[root@localhost ~]# usermod -aG wheel centos
[root@localhost ~]#
vi /etc/pam.d/su #%PAM-1.0 auth sufficient pam_rootok.so # Uncomment the following line to implicitly trust users in the "wheel" group. #auth sufficient pam_wheel.so trust use_uid # Uncomment the following line to require a user to be in the "wheel" group. # uncomment the following line auth required pam_wheel.so use_uid auth substack system-auth auth include postlogin account sufficient pam_succeed_if.so uid = 0 use_uid quiet account include system-auth password include system-auth session include system-auth session include postlogin session optional pam_xauth.so # verify settings with a user that is not in allowed group [redhat@localhost ~]$ su -
Password:
su: Permission denied # denied normally
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| [4] | If you'd like to remove a user accounts, Set like follows. |
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# remove a user [centos] (removed user account and his home directory both) [root@localhost ~]# userdel -r centos
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