列出所有服务
systemctl list-unit-files
列出运行中的服务
systemctl list-units
列出所有失败的服务
systemctl --failed
检查单个服务是否启用
systemctl is-enabled mysqld.service
查看单个服务的状态
systemctl status firewalld.service
启动、重启、停止、重载某个服务
systemctl start httpd.service systemctl restart httpd.service systemctl stop httpd.service systemctl reload httpd.service systemctl status httpd.service
激活/禁止自动重启
systemctl enable httpd.service systemctl disable httpd.service
使用Systemctl控制并管理挂载点
systemctl list-unit-files --type=socket systemctl start cups.socket systemctl restart cups.socket systemctl stop cups.socket systemctl reload cups.socket systemctl status cups.socket systemctl is-active cups.socket systemctl enable cups.socket systemctl disable cups.socket systemctl mask cups.socket
使用Systemctl管理服务的CPU利用率
systemctl show -p CPUShares httpd.service systemctl set-property httpd.service CPUShares=2000 systemctl show -p CPUShares httpd.service systemctl show httpd
启动防火墙
systemctl start firewalld.service
停止防火墙
systemctl stop firewalld.service
查看firewalld防火墙状态
firewall-cmd --state
禁止防火墙开机启动
systemctl disable firewalld.service
列出正在运行的服务状态
systemctl
启动一个服务
systemctl start postfix.service
关闭一个服务
systemctl stop postfix.service
重启一个服务
systemctl restart postfix.service
显示一个服务的状态
systemctl status postfix.service
在开机时启用一个服务
systemctl enable postfix.service
在开机时禁用一个服务
systemctl disable postfix.service
查看服务是否开机启动
systemctl is-enabled postfix.service
查看已启动的服务列表
systemctl list-unit-files|grep enabled