Su root, incorrect password, the password is correct

In centos, the system prompts "Incorrect password" when using Su, but the password is correct.

After searching for a long time, use the following method:

 

1. View
In the/etc/PAM. d/su file, check whether the following sentence is valid.
Auth required pam_whell.so use_uid

Check out
Does the/etc/login. defs file have the following sentence?
Su_wheel_only Yes

If yes, comment out.

2. Check whether the attributes of the/bin/su file are 'rwsr-XR-x'. If not, change it.

Chmod U + S/bin/su

If u-any other user can, a specific user cannot, the solution is:

Write down the UID and gid of the user and related groups, delete, recreate, and assign the same GID and group ID

Note: If the user cannot be deleted, create a new user and add a group.

 

 

 

Method Source: http://topic.csdn.net/u/20100115/10/c57ea30c-f38b-42ba-8aa9-23e7c92efb35.html