Linux common commands (iv)

Commands for shutting down and viewing system information

1.shutdown: Normal shutdown

(Note: You must be a root user, or you will need to switch to the root user with the SU command)

Eg: shutdown in less than 5 minutes: shutdown-t 5

Restart after shutdown: shutdown-r

Cancel shutdown operation: shutdown-c

Other parameters can refer to the following table:

2.reboot: Shutdown command. (Fastest shutdown, no memory or buffer data saved to memory)

Parameter options:

3.PS: See which programs are executing and performing. Similar to the Task Manager under Windows.

Other parameters refer to the following table:

4.top: View the current program's execution scenarios and memory usage. (and PS difference: top command will be updated once a few seconds)

5.kill: Terminates a process that is executing.

Usage: Kill (-option) PID

Eg: cut off the stroke with PID 233: kill-9 233

The process of re-running 555: Kill-puh 555

6.date: Displays the current time and date

The command returned should be February 07, 2018, 09:24 P.M. 37 seconds (because my computer installed the virtual machine has not been adapted to Chinese, so the display has a problem)

Parameters refer to the following table:

7.cal: Calendar

Cal 02 2018

Linux common commands (iv)