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Modifying Host Names

  1. Set the host name of each node.
    1
    hostnamectl set-hostname HOSTNAME

    HOSTNAME: host name. The value cannot contain special characters including .#$

    After the modification, log in to the OS again for the change to take effect.

  2. Modify the /etc/hosts file on all nodes based on the network requirements.
    1. Open the file.
      1
      vi /etc/hosts
    2. Press i to enter the insert mode and add the following content:
      1
2
      HOSTIP1 HOSTNAME1
HOSTIP2 HOSTNAME2

      HOSTIP: host IP address.

      HOSTNAME: host name.

      For example: 192.168.14.2 controller

    1. Press Esc to exit the insert mode. Type :wq! and press Enter to save the file and exit.