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Local user account unable to "su" to another local user account
Applies To:
Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 5.0 to Oracle Linux 8.3 with Unbreakable Enterprise Kernel [5.4.17] [Release OL5 to OL8U3]
Symptoms:
Local user account unable to "su" to another local user account.
[opc@<SERVER1> ~]$ su <TESTUSER1> Password: su: Permission denied [opc@<SERVER2> ~]$ su <TESTUSER2> Password: su: Permission denied
Changes:
None
Cause:
The file /etc/pam.d/su has an entry "auth required pam_wheel.so use_uid" in the stack.
[root@localhost ~]# head /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. 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 [root@localhost
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