How to mount/umount as non root user [on hold]

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http://stackoverflow.com – As per title, how to mount/umount a removable media as non root user obtaining read/write permission on it? I've tried to write a udev rule but I was not able to get it work. I can either have mount/umount permissions as non-root user (user,exec,dev,suid mount options) or get read/write permissions (uid=500, gid=500) I've got a Linux Centos 6.x (HowTos)