Centos7 uses systemctl
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Systemctl is the main tool in CentOS7's service management tool, which combines the functions of the previous service and chkconfig.
Start a service: systemctl start firewalld.service
Close a service: systemctl stop firewalld.service
Restart a service: systemctl restart firewalld.service
Display the status of a service: systemctl status firewalld.service
Enable a service at boot time: systemctl enable firewalld.service
Disable a service at boot time: systemctl disable firewalld.service
Check whether the service is powered on: systemctl is-enabled firewalld.service
View the list of started services: systemctl list-unit-files|grep enabled
View the list of services that failed to start: systemctl --failed
Reprinted at: https://www.jianshu.com/p/bc3a0732925a
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