Common commands of Linux system (2) Permanently modify the host name, view the status of the host name, set the system language, view the system startup time, and turn off the firewall

1. Permanently modify the hostname

hostnamectl set-hostname new name

Restart the system:

2. View the status of the hostname

hostnamectl status

3. Set the system language

View the language localectl status used by the current system

Set the system language to Chinese (you can use this command when you select the wrong language when installing the virtual machine):

localectl set-locale LANG=zh_CN.utf8

4. View the system startup time

systemd-analyze

5. Turn off the firewall

5.1 Temporary closure

systemctl stop firewalld.service
setenforce 0

5.2 Permanent closure

vim /etc/sysconfig/selinux