1 init
shutdown: init 0
reboot: init 6
2 reboot
reboot: reboot
3 shutdown
Introduction to commands
This command can safely shut down or restart the system.
command syntax
shutdown [-fFhknrc] [-t seconds] time [warning message]
Command parameters
| parameter | meaning |
| -f | Do not execute fsck on reboot |
| -F | Execute fsck on reboot |
| -h | Shuts down the system, in a way equivalent to the halt command |
| -k | Just send a message to all users, but don't really shut down |
| -n | Do not call the init program to shut down, but shutdown itself. Using this parameter will speed up the shutdown, but it is not recommended to use |
| -r | Reboot the system after shutdown |
| -c | Cancels the previous shutdown command. |
| -t seconds | How many seconds to delay between sending the warning message and the shutdown signal. |
| time | Set how long before the shutdown command is executed. |
| Warning message | Information to be sent to all logged in users. |
Command example
Shutdown and restart: shutdown -r now
Shutdown immediately: shutdown -h now
Shut down after 5 minutes, and send a warning message to the user: shutdown +5 "System will shutdown after 5 minutes"
4 halt
Introduction to commands
When this command is executed, all applications will be terminated, then the system command sync, sync will be called to write all memory information to the hard disk through the file system, and then the kernel will be stopped.
command syntax
stop [-finp]
Command parameters
| parameter | meaning |
| -f | No matter what run level the current system is in, it will force shutdown without calling shutdown. |
| -i | Before shutting down, turn off all network interfaces. |
| -n | When halt is executed, the system command sync is not called |
| -p | Call poweroff when shutting down, that is, turn off the power while shutting down. |