管理服务
命令格式:systemctl COMMAND name.service
注意:以下name.service表示某个具体服务
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
服务查看
##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
服务状态
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
杀掉进程
systemctlkill进程名
chkconfig命令的对应关系
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
用来列出该服务在哪些运行级别下启用和 禁用
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
查看服务是否开机自启:
systemctl is-enabled name.service
[root@localhost ~]# systemctl is-enabled sshd.service
enabled
查看服务的依赖关系:
systemctllist-dependenciesname.service
运行级别
unit 配置文件:.target
ls /usr/lib/systemd/system/*.target
systemctl list-unit-files --type target --all //查看级别
查看依赖性:
systemctllist-dependenciesgraphical.target//查看级别的依赖性