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管理服务@H_403_2@

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命令格式：systemctl COMMAND name.service
注意：以下name.service表示某个具体服务@H_403_2@

启动：service name start  ==> systemctl start name.service
停止：service name stop   ==> systemctl stop name.service
重启：service name restart ==> systemctl restart name.service
状态：service name status  ==> systemctl status name.service
条件式重启：已启动才重启，否则不做操作: service name cond restart ==> systemctl try-restart name.service
重载或重启服务：先加载，再启动: systemctl reload-or-restart name.service
重载或条件式重启服务：systemctl reload-or-try-restart name.service
禁止自动和手动启动：systemctl mask name.service
取消禁止：systemctl unmask name.service

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服务查看@H_403_2@

##查看 某服务当前激活与否的状态： systemctl is-active name.service
##查看所有已经激活的服务：  systemctl list-units --type|-t service
##查看所有服务： systemctl list-units --type service -a

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服务状态@H_403_2@

systemctl list-units --type service --all 显示状态
loaded:Unit 配置文件已处理
active(running): 一次或多次持续处理的运行
active(exited): 成功完成一次性的配置
active(waiting): 运行中，等待一个事件
inactive: 不运行
enabled: 开机启动
disabled: 开机不启动
static:开机不启动，但可被另一个启用的服务激活

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杀掉进程@H_403_2@

systemctlkill进程名

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chkconfig命令的对应关系@H_403_2@

设定某服务开机自启：
chkconfig name on ==> systemctl enable name.service
设定某服务开机禁止启动：
chkconfig name off ==> systemctl disable name.service
查看所有服务的开机自启状态：
chkconfig --list ==> systemctl list-unit-files --type service

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用来列出该服务在哪些运行级别下启用和 禁用@H_403_2@

chkconfig sshd �Clist ==> ls /etc/systemd/system/*.wants/sshd.service
[root@localhost ~]# ls /etc/systemd/system/*.wants/sshd.service
/etc/systemd/system/multi-user.target.wants/sshd.service

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查看服务是否开机自启：@H_403_2@

systemctl is-enabled name.service
[root@localhost ~]# systemctl is-enabled sshd.service
enabled

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查看服务的依赖关系：@H_403_2@

systemctllist-dependenciesname.service

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运行级别
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unit 配置文件：.target@H_403_2@

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ls /usr/lib/systemd/system/*.target
systemctl list-unit-files --type target --all //查看级别

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查看依赖性：@H_403_2@

systemctllist-dependenciesgraphical.target//查看级别的依赖性