# Begin /etc/pam.d/su # always allow root auth sufficient pam_rootok.so # Allow users in the wheel group to execute su without a password # disabled by default #auth sufficient pam_wheel.so trust use_uid # include system auth settings auth include system-auth # limit su to users in the wheel group # disabled by default #auth required pam_wheel.so use_uid # include system account settings account include system-account # Set default environment variables for the service user session required pam_env.so # include system session settings session include system-session # End /etc/pam.d/su