Tips for shutting down the computer in CentOS: Use the systemctl command to shut down the computer

Introduction

Starting from CentOS 7.x, CentOS began to use the systemd service instead of daemon. The original commands related to managing system startup and managing system services were all replaced by the systemctl command.

systemctl command parameters include:

halt	Enter system shutdown mode, the power may not be cut off
poweroff	Enter system shutdown mode, power off
reboot	Restart directly
suspend	The system hangs and enters sleep mode

For example, to restart the system, you can execute the command #systemctl reboot

Summed up

Correct use of power on and off commands can prevent abnormal damage to the hardware and ensure the normal and stable operation of the system.
1. In order to avoid damage to the Linux file system caused by instantaneous power outages, it is recommended that the Linux host used as a server use a dual power supply UPS system to continuously provide stable power.
2. Develop good operating habits, avoid logging in to the system directly as root, create an ordinary user to log in to the system, and start applications as an ordinary user.
3. Follow the correct system shutdown method to prevent system and hardware damage, and use shutdown, poweroff and other commands to shut down correctly.

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