[Linux] DNS settings

Introduction

Note on how to set DNS in Redhat environment

Environmental information

OS：Redhat 7.7

DNS settings

Enter the domain name and DNS server IP address in the configuration file

Configuration file: /etc/resolv.conf

search [domain name]
nameserver [IP address]

See below to disable the automatic update of the /etc/resolv.conf file when the server is restarted. [Linux] How to disable automatic update of /etc/resolv.conf file (Redhat) [Linux] How to disable automatic update of /etc/resolv.conf file (AmazonLinux2)

Restart NetworkManager

systemctl restart NetworkManager

Communication confirmation

Confirm that the IP address is resolved by the host name by setting the DNS server

ping [host name]

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