Linux prohibits ordinary users from switching to the root user using Su

In general, the average user can log on as the root user to configure the system at the administrator level by executing the "Su-" command and entering the correct root password.

However, in order to further enhance the security of the system, it is necessary to establish a group of administrators, only allow users of this group to execute the "Su-" command to log on as the root user, and let other groups of users even if the "Su-", entered the correct root password, can not log into the root user. Under UNIX and Linux, the name of this group is usually "wheel".

1: Add a user

[Email protected] ~]# Useradd Dongee

[Email protected] ~]# passwd Dongee

2: Add Dongee user to Wheel Group:

[[email protected] ~]# usermod-g wheel dongee← Add the general user Dongee in the Administrators group wheel Group

3: Modify the/ETC/PAM.D/SU configuration

[[email protected] ~]# vi/etc/pam.d/su← Open this configuration file

#auth Required pam_wheel.so use_uid← Find this trip, remove the "#" from the beginning of the line

4: Modify the/etc/login.defs file

[[email protected] ~]# echo "su_wheel_only yes" >>/etc/login.defs← add statement to the end of the line after the completion of the operation, you can create a new user, and then use this new user test will find that Users who are not joined to the wheel group, execute the "Su-" command and cannot log in as root even if the correct root password is entered.

This article is from the "Baby God" blog, make sure to keep this source http://babyshen.blog.51cto.com/8405584/1579084

Linux prohibits ordinary users from switching to the root user using Su