Manager Installation Failure Due to Absence of Local Domain Name in the /etc/hosts File

An error occurs during Manager installation.Possible Causes
:The local domain name localhost of the management node is not configured in the /etc/hosts file.
Procedure:1.Log in to a server where the Manager is to be installed as user root on the local PC. When the Manager two-node cluster is installed, log in to the standby management node and repeat the following operations.
2.Open the hosts file:vi /etc/hosts
3.Check whether the file contains localhost. If no, press Insert to enter the editing mode and add localhost to this file. If yes, go to 4.
4.Press Esc to exit the editing mode, and enter :wq to save the configuration and exit.

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