Adding GitHub to Your Hosts File

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Here's how to access GitHub despite a DNS outage. This tutorial is for Mac, but the general idea applies to other operating systems, too.

1) Adding GitHub to your hosts file

First, Get the A records for github.com, avatars3.githubusercontent.com, assets-cdn.github.com. You can do this with a command like:

host github.com 8.8.8.8

Next, open your hosts file with the following command:

sudo nano /etc/hosts

You don't have to use nano. I'm just using it for this walkthrough. Now add the following lines, with tabs in between each IP and the domain name:

192.30.253.112    github.com
151.101.48.133    avatars3.githubusercontent.com
151.101.48.133    assets-cdn.github.com

Save with Ctrl+O, and exit with Ctrl+X.

2) Flushing your DNS

This part varies based on the version of macOS you're running. I'd just follow this tutorial: https://www.igeeksblog.com/how-to-flush-dns-in-mac-os-x/

Now you should be done. Let me know if you run into any issues.

Tags: hosts dns github dyn outage

See also: How to SSH tunnel to a Docker container on a remote server

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Neel Somani

About the Author

Neel Somani is a software engineer in the Bay Area. In addition to computer science, he's interested in philosophy and entrepreneurship. You can follow him on LinkedIn and Twitter.

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