"Linux Notes" CentOS 7 Systemctl, FIREWALLD

First, CentOS7 Systemctl

In CentOS7, the chkconfig command operation will find a similar "Systemctl ..." hint, systemctl can simply implement the combination of service and chkconfig, so that the two commands can be implemented by a single command function.

The basic operation format of the SYSTEMCTL command is:

Systemctl [OPTIONS ...]  {COMMAND} ...

For the Nginx service example, the following actions are implemented to stop, start, and restart:

Systemctl Stop    nginx.servicesystemctl start   nginx.servicesystemctl restart Nginx.service

Check Service status

Systemctl Status Nginx.service

Start the service on boot

Systemctl Enable Nginx.service

Cancel service boot up

Systemctl Disable Nginx.service

Second, CentOS 7 firewalld

"Linux Notes" CentOS 7 Systemctl, FIREWALLD