Linux Learning Unit 8

8. Control of System Services

1.systemd

System Initialization program, the first process that the system starts,the PID is 1

2.systemctl command

Systemctl list-units # #列出当前系统服务的状态

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Systemctl list-unit-files # #列出服务的开机状态

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systemctl Status sshd # #查看指定服务的状态

systemctl Stop sshd # #关闭指定服务

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systemctl start sshd # #开启指定服务

systemctl Restart sshd # #从新启动服务

Systemctl Enable sshd # #设定指定服务开机开启

systemctl Disable sshd # #设定指定服务开机关闭

Systemctl Reload sshd # #使指定服务从新加载配置

systemctl list-dependencies sshd # #查看指定服务的倚赖关系

Systemctl Mask sshd # #冻结指定服务

systemctl unmask sshd # #启用服务

systemctl Set-default multi-user.target # #开机不开启图形

systemctl Set-default graphical.target # #开机启动图形

Setterm # #文本界面设定color

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3. Service Status

Systemctl Status Service Name

Loaded # #系统服务已经初始化完成, loaded configuration

Active (running) # #正有一个或多个程序正在系统中执行,

# VSFTPD is this pattern

atcive (exited) # #僅執行一次就正常結束的服務,

# There are no programs in the system at this time.

atcive (Waiting) # #正在執行當中,

# and wait for other events to continue

Inactive # #服务关闭

enbaled # #服务开机启动

Disabled # #服务开机不自启

Static # #服务开机启动项不可被管理

failed # #系统配置错误

Linux Learning Unit 8