Sixth, shutdown and restart commands
1, the shutdown command
Format: shutdown [options] time
Options:
-c: cancel before a shutdown command
-h: Shutdown
-r: Restart
time:
now: shut down right now
2, other shutdown command
(1)halt
(2)poweroff
(3)init 0
Note that this is the best three commands Freeze, because not the same as the shutdown to help when we shut down to save the file.
3 Other reboot command
(1)reboot
(2)init 6
4, the system run level
0: Shutdown
1: single-user
2: Incomplete multi-user, without NFS service
3: Full multiuser
4: Unassigned
5: the graphical interface
6: Restart
5, view the current level command
runlevel: View command level
cat / etc / initab: Save command level directory
3: boot default interface-level command character level
5: Graphic level command
N 3: indicates the boot into the character interface
3 N 5: characters into a graphical interface from the interface, the first digit is the previous level, the number is a level of current into the
6, logout command
logout: When there are multiple users, please exit the current user login prompt