: pam_systemd(su-l:session): Cannot create session: Already running in a session or user sliceMar 17 14:51:45 octave.sh su : pam_unix(su-l:session): session opened for user vnc_user by root(uid=0)Mar 17 14:52:11 octave.sh polkitd : Registered Authentication Agent for unix-process:14567:1448779 (system bus name :1.2191  , object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale zh_CN.UTF-8)Mar 17 14:52:36 octave.sh polkit