Linux limits users to switch from SU to other users

Article Title: Linux limits users to switch from SU to other users. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. If you do not want some people to use the "su" command to become root or switch to another user, in the "/etc/pam. d/su. These can improve the security of the system.

Add these two lines under/etc/pam. d/su:

Auth sufficient/lib/security/$ ISA/pam_rootok.so

Auth required pam_wheel.so use_uid group = admin

// Group = admin: Specifies the group to be allowed. Only members of the admin group can be su root.

First, create an admin group.

# Addgroup admin

Add users that can use the su command to the admin group, for example, test, test2; test is the admin group, and test2 does not belong to the admin group.

# Usermod-G admin test

After the preceding settings, only user test uses the su command, but test2 does not. You cannot use su to switch to another user.