This article will help you to how to manage services using the systemctl command for Systemd services. Systemd is a system and service manager for Linux-based operating systems for managing services. Systemd is more powerful and getting more popularity over older SysVinit. Most of newer release of the Linux-based operating system (eg: CentOS/Redhat 7, Fedora 25, Ubuntu 16.04) using Systemd as a default service management tool.
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Before using the following example commands change <servicename> with your actual service name like httpd, mysql, apache2 or ssh.
Start or Stop Service:
Syntax:
$ sudo systemctl start <servicename>.service $ sudo systemctl stop <servicename>.service
- start: Used to start a stopped service
- Stop: Used to stop a running service
Example:
$ sudo systemctl start ssh.service $ sudo systemctl stop ssh.service
Restart or Reload Service:
$ sudo systemctl reload ssh.service $ sudo systemctl restart ssh.service $ sudo systemctl reload-or-restart ssh.service
- Reload: Used to reload configuration of a running service
- Restart: Used to restart (Stop/Start) a running service
- reload-or-restart: Used to reload a service default, but if reload is not available for that service. It will restart it
Check Status of Service:
$ sudo systemctl status ssh.service
- Status: Used to check current status of a service
Enable or Disable Service:
$ sudo systemctl enable ssh.service $ sudo systemctl disable ssh.service
- Enable: Used to enable service to start on system boot
- Disable: Used to disable service to not to start on system boot
Check Enable/Disable Status of Service:
$ sudo systemctl is-active ssh.service $ sudo systemctl is-enabled ssh.service
- is-active: Used to check if service current service status
- is-enabled: Used to check if service is enabled to start on system boot
Reference:
https://fedoraproject.org/wiki/SysVinit_to_Systemd_Cheatsheet