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7. Common Commands in CentOS 7

#CentOS7学习笔记151
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Common commands in CentOS7 include querying run levels, switching run levels, clearing the screen, checking IP address, testing network connectivity, managing services with systemctl, checking and controlling SELinux status, and using the echo and tar commands.

Common Commands in CentOS7#

System Commands#

  1. Check runlevel: runlevel

    Knowledge about runlevel commands:

    0: Shutdown
1: Single-user text mode (password recovery)
2:
3: Multi-user text mode
4:
5: Multi-user graphical mode
6: Reboot

  2. Switch runlevel: init

  3. Clear screen command: clear

Network Commands#

  1. View local IP: ip addr

  2. Test network connectivity: ping

Service Commands#

systemctl: Manage services

systemctl service_name status: Check service status

systemctl service_name stop: Stop service

systemctl service_name start: Start service

systemctl service_name restart: Restart service

systemctl service_name enable: Enable service at startup

systemctl service_name disable: Disable service at startup

getenforce: Check the status of selinux

setenforce: Set selinux status

Other Commands#

echo: Print message

tar -z

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