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Method 1 hostnamectl modification

Step1 View Hostname

Hostname

Step2 modifies hostname

Command form

Hostnamectl set-hostname Hostnam

Modify

Hostnamectl set-hostname Master

Step3 check the hostname again

Hostname

No need to restart, just a new meeting call can be changed to a new hostname.

Method 2 by modifying the file

Modify a file

Vi / etc/hostname add hostname

Slave01

Vi / etc/sysconfig/network add IP and hostname correspondence

10.238.162.33 Slave01

Restart reboot takes effect

Method 3 temporarily modify the hostname

Hostname Slave01

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