The following folder has 777 permission however, it is owned by the root.
[root@cluster tmp]# ls -la drwxrwxrwt 2 root root 4096 Oct 16 21:53 .X11-unix/
So, a user can not delete his file (vnc lock) in that folder. How can I grant that for all user. Then they will be able to remove their vnc lock without root permission.