linux systemctl 查看服务的状态、runlevel和target的对应关系
【摘要】 ECS信息规格：2vCPUs | 4GiB | kc1.large.2镜像：openEuler 20.03 64bit with ARM | 公共镜像 linux systemctl 查看服务的状态、runlevel和target的对应关系 systemctl status 查看服务的状态IP地址已做隐藏处理# systemctl status sshd.service● sshd.se...
ECS信息
- 规格：2vCPUs | 4GiB | kc1.large.2
- 镜像：openEuler 20.03 64bit with ARM | 公共镜像
linux systemctl 查看服务的状态、runlevel和target的对应关系
systemctl status 查看服务的状态
IP地址已做隐藏处理
# systemctl status sshd.service
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2021-09-26 16:48:16 CST; 5h 34min ago
Docs: man:sshd(8)
man:sshd_config(5)
Main PID: 1902 (sshd)
Tasks: 1
Memory: 24.2M
CGroup: /system.slice/sshd.service
└─1902 /usr/sbin/sshd -D
Sep 26 21:39:42 ecs-4eee sshd[3571]: rexec line 153: Deprecated option RSAAuthentication
Sep 26 21:39:42 ecs-4eee sshd[3571]: rexec line 155: Deprecated option RhostsRSAAuthentication
Sep 26 21:49:18 ecs-4eee sshd[3699]: rexec line 153: Deprecated option RSAAuthentication
Sep 26 21:49:18 ecs-4eee sshd[3699]: rexec line 155: Deprecated option RhostsRSAAuthentication
Sep 26 22:00:53 ecs-4eee sshd[3924]: rexec line 153: Deprecated option RSAAuthentication
Sep 26 22:00:53 ecs-4eee sshd[3924]: rexec line 155: Deprecated option RhostsRSAAuthentication
Sep 26 22:00:53 ecs-4eee sshd[3924]: Connection from XXX.XXX.XXX.XXX port 50408 on XXX.XXX.XXX.XXX port 22 rdom
Sep 26 22:00:53 ecs-4eee sshd[3924]: Connection reset by XXX.XXX.XXX.XXX port 50408 [preauth]
Sep 26 22:11:52 ecs-4eee sshd[4044]: rexec line 153: Deprecated option RSAAuthentication
Sep 26 22:11:52 ecs-4eee sshd[4044]: rexec line 155: Deprecated option RhostsRSAAuthentication
systemctl is-enabled 查看服务是否为开机启动
# systemctl is-enabled sshd.service
enabled
systemd runlevel和target 的对应关系
# pwd
/lib/systemd/system
# ll | grep runlevel
lrwxrwxrwx. 1 root root 15 Mar 24 2020 runlevel0.target -> poweroff.target
lrwxrwxrwx. 1 root root 13 Mar 24 2020 runlevel1.target -> rescue.target
drwxr-xr-x. 2 root root 4.0K Mar 24 2020 runlevel1.target.wants
lrwxrwxrwx. 1 root root 17 Mar 24 2020 runlevel2.target -> multi-user.target
drwxr-xr-x. 2 root root 4.0K Mar 24 2020 runlevel2.target.wants
lrwxrwxrwx. 1 root root 17 Mar 24 2020 runlevel3.target -> multi-user.target
drwxr-xr-x. 2 root root 4.0K Mar 24 2020 runlevel3.target.wants
lrwxrwxrwx. 1 root root 17 Mar 24 2020 runlevel4.target -> multi-user.target
drwxr-xr-x. 2 root root 4.0K Mar 24 2020 runlevel4.target.wants
lrwxrwxrwx. 1 root root 16 Mar 24 2020 runlevel5.target -> graphical.target
drwxr-xr-x. 2 root root 4.0K Mar 24 2020 runlevel5.target.wants
lrwxrwxrwx. 1 root root 13 Mar 24 2020 runlevel6.target -> reboot.target
-rw-r--r--. 1 root root 801 Mar 24 2020 systemd-update-utmp-runlevel.service
| runlevel | target |
|---|---|
| runlevel0.target | poweroff.target |
| runlevel1.target | rescue.target |
| runlevel2.target | multi-user.target |
| runlevel3.target | multi-user.target |
| runlevel4.target | multi-user.target |
| runlevel5.target | graphical.target |
| runlevel6.target | reboot.target |
帮助文档（部分）
# systemctl -h
systemctl [OPTIONS...] {COMMAND} ...
Query or send control commands to the systemd manager.
-h --help Show this help
--version Show package version
--system Connect to system manager
--user Connect to user service manager
-H --host=[USER@]HOST
Operate on remote host
......
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