关于linux:linux之systemctl命令

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Linux 服务治理两种形式 service 和 systemctl,systemd 是 Linux 零碎最新的初始化零碎 (init), 作用是进步零碎的启动速度，尽可能启动较少的过程，尽可能更多过程并发启动。systemd 对应的过程治理命令是 systemctl

工作	旧指令	新指令
使某服务主动启动	chkconfig –level 3 httpd on	systemctl enable httpd.service
使某服务不主动启动	chkconfig –level 3 httpd off	systemctl disable httpd.service
查看服务状态	service httpd status	systemctl status httpd.service（服务详细信息）systemctl is-active httpd.service（仅显示是否 Active)
显示所有已启动的服务	chkconfig –list	systemctl list-units –type=service
启动服务	service httpd start	systemctl start httpd.service
进行服务	service httpd stop	systemctl stop httpd.service
重启服务	service httpd restart	systemctl restart httpd.service
重载服务	service httpd reload	systemctl reload httpd.service

# 进行 cup 电源治理服务
> systemctl stop cups.service
#禁止 cups 服务开机启动
> systemctl disable cups.service
#查看 cups 服务状态
> systemctl status cups.service
#从新设置 cups 服务开机启动
> systemctl enable cups.service

systemctl 命令	阐明
systemctl	列出所有的零碎服务
systemctl list-units	列出所有启动 unit
systemctl list-unit-files	列出所有启动文件
systemctl list-units –type=service –all	列出所有 service 类型的 unit
systemctl list-units –type=service –all grep cpu	列出 cpu 电源管理机制的服务
systemctl list-units –type=target –all	列出所有 target
systemctl list-unit-files –type=socket	列出所有可用零碎套接口

systemctl 命令	阐明
systemctl is-active [unit type]	查看服务是否运行
systemctl is-enable [unit type]	查看服务是否设置为开机启动
systemctl mask [unit type]	登记指定服务
systemctl unmask [unit type]	勾销登记指定服务