systemctl ==> service + chkconfig
systemctl scan list: original /etc/init.d, then 7: / usr / lib / systemd / system
Start a service:
systemctl Start postfix.service
Close a service:
systemctl STOP postfix.service
Restart a service:
systemctl restart postfix.service
Status display of a service:
systemctl Status postfix.service
Enable a service at boot:
systemctl enable postfix.service
At boot disable a service:
systemctl disable postfix.service
See if service startup:
systemctl IS-Enabled postfix.service
View your active list of services:
systemctl List-Unit-Files | grep Enabled
View a list of services failed to start:
systemctl --failed
Use command value systemctl is-enabled postfix.service obtained may enable, disable, or static, static here it refers to the corresponding file is not defined Unit [Install] region, the service can not be configured to boot.
Service is enabled in the current "runlevel" profile directory /etc/systemd/system/multi-user.target.wants in softlinks the corresponding service configuration file / usr / lib / systemd / system inside;
Disabling this service is to remove soft links, add the service is to add a soft link.