On 07/21/2010 03:24 AM, Toshio Kuratomi wrote:I have a few requests for things to add to that page :-) * What replaces chkconfig systemd-install Now first the gotcha then I'll provide chkconfig replacement example. Admins will need to know that they have to use chkconfig for services that do not have a native systemd $service file. ( legacy for services ) And as the general rule goes "native configuration breaks legacy configuration" so if a native systemd $service file does exist than changing service via chkconfig no longer will work. Now the systemd developers could add a little pony to speed up adoption and prevent potential chkconfig Admin/User fiasco by simply letting systemd-install fallback to chkconfig if it finds no native service file in /lib/systemd/system/ with msg to stdout asking Admins to file a bug against a given missing service. Admins/Users could then stop using chkconfig and use systemd-install only instead which would speed up adobtion Systemd-install examples ( see man page for detail list of options ) To see running targets on your system. systemctl list-units --type=target To see all available running targets on your system. systemctl list-units --type=target --all To see which native systemd system files exist on your installed system ls /lib/systemd/system/ To enable service ( chkconfig $service on ) systemd-install enable $service.service To disable service ( chkconfig $service off ) systemd-install disable $service.service To enable service and start it ( chkconfig $service on && service $service start ) systemd-install --realize=yes enable $service.service To always start service on boot instead of when a connection comes in or some hardware is plugged in. ln -sf /lib/systemd/system/foobar.service /etc/systemd/system/multi-user.target.wants/foobar.service Remember to reload the systemd manager systemctl daemon-reload So to enable avahi-daemon systemd-install enable avahi-daemon.service To disable avahi-daemon systemd-install disable avahi-daemon.service To enable avahi-daemon and start it systemd-install --realize=yes enable avahi-daemon.service To always start avahi-daemon on boot ln -sf /lib/systemd/system/avahi-daemon.service /etc/systemd/system/multi-user.target.wants/avahi-daemon.service Reload the systemd manager systemctl daemon-reload * What replaces /etc/init.d/SERVICENAME start | stop ? systemctl. systemctl examples ( sem man pages for detail list of options ) Replacing traditional /sbin/service with systemctl To list running services systemctl list-units --type=service To list all available services systemctl list-units --type=service --all To start a service systemctl start $foo.service To stop a service systemctl stop $foo.service To reload a service .conf file. systemctl reload $foo.service To restart a service systemctl restart $foo.service To show service status ( Admins should love the output from this ) systemctl status $foo.service Using Apache as an example Starting Apache systemctl start httpd.service Stopping Apache systemctl stop httpd.service Reloading httpd.conf systemctl reload httpd.service Restarting Apache systemctl restart httpd.service To check if Apache is running systemct status httpd.service I will add this ( and more ) to the page soon as can. |
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