osx shutdown, restart, sleep script

gistfile1.txt

Shut down without showing a confirmation dialog:
osascript -e 'tell app "System Events" to shut down'

Shut down after showing a confirmation dialog:
osascript -e 'tell app "loginwindow" to «event aevtrsdn»'

Restart without showing a confirmation dialog:
osascript -e 'tell app "System Events" to restart'

Restart after showing a confirmation dialog:
osascript -e 'tell app "loginwindow" to «event aevtrrst»'

Log out without showing a confirmation dialog:
osascript -e 'tell app "System Events" to  «event aevtrlgo»'

Log out after showing a confirmation dialog:
osascript -e 'tell app "System Events" to log out'

Go to sleep (pmset):
pmset sleepnow

Go to sleep (AppleScript):
osascript -e 'tell app "System Events" to sleep'

Put displays to sleep (10.9 and later):
pmset displaysleepnow

https://developer.apple.com/library/mac/qa/qa1134/_index.html