systemd是CentOS中的系統和服務管理器。可以使用以下命令來使用systemd:
systemctl start servicename
systemctl stop servicename
systemctl restart servicename
systemctl reload servicename
systemctl status servicename
systemctl enable servicename
systemctl disable servicename
systemctl list-units --type=service
systemctl list-unit-files --type=service
通過這些命令,可以輕松地管理CentOS系統中的各種服務。