Three methods to modify the hostname of Centos7

Method 1: hostnamectl modification

Step 1 Check the host name

hostname

Step 2 Change the host name

Command form

hostnamectl set-hostname hostname

Revise

hostnamectl set-hostname Master

Step 3 Check the host name again

hostname

No need to restart, just open a new session to change to a new hostname

Method 2: By modifying the file

Modify the file

vi /etc/hostname add hostname

Slave01

vi /etc/sysconfig/network Add the correspondence between IP and hostname

10.238.162.33 Slave01

Reboot to take effect

Method 3: Temporarily modify the host name

hostname Slave01

Summarize

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