I've used sudo before successfully, but suddenly it doesn't work anymore! For example, I try setting a shutdown timer using Code: sudo shutdown -h +60 or sudo pmset disksleep 30 or even just sudo and get Code: sudo: can't open /private/etc/sudoers: Permission denied Just typing sudo alone results in the same error. I've tried searching and following other threads on this topic to no avail. Repairing permissions from disk utility didn't help either. And sadly I'm a unix newb. Any help would be appreciated. Thank you.