VNC freedesktop.packagekit popup annoying

refer to the link at http://unix.stackexchange.com/questions/34664/how-to-disable-password-prompting-for-automatic-updates-on-red-hat

I believe the solution is to modify the local PolicyKit definitions. Create a file called, say, /etc/polkit-1/localauthority/50-local.d/allowuserupdate.pkla

[Allow User Updates]
Identity=*
Action=org.freedesktop.packagekit.system-update
ResultAny=no
ResultInactive=no
ResultActive=yes

If you only want your user, you could change Identity=YOURUSERNAME (replace YOURUSERIDwith your username).