Linux Cloud Automation Operations Basics 8 (process)

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# # # #8. System Service Control # # # #
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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
Systemctl List-unit-files # #列出服务的开机状态
Systemctl Status sshd # #查看指定服务的状态
Systemctl Stop sshd # #关闭指定服务
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

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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

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Linux Cloud Automation Operations Basics 8 (process)