There are many different ways to configure a static IP address on RHEL 8 and Centos 8 servers. Here we can cover these 3 methods .
1) Nmtui Tool
2) Nmcli Tool
3) Editing network config files
For beginners, I would recommend nmtui tool which is easy to assign using TUI. Other 2 methods needs some extra care since all commands and values are case sensitive .
After OS installation, Usually we cannot connect to the server using SSH till we assign the IP address. In this case, You can access the server via remote console and you can assign IP address using any of these methods. Of course you can SSH if you already assigned IP address during installation and you can use this article to modify IP address.
https://www.krizna.com/rhel/how-configure-static-ipaddress-rhel8-centos8/
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