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Home/ Questions/Q 3938906
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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T00:14:17+00:00 2026-05-20T00:14:17+00:00

I’m developing a Rails 3 app locally on my Mac. I want to test

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I’m developing a Rails 3 app locally on my Mac. I want to test it locally with fake URLs that support subdomains, e.g. http://blah.example.com and http://blah2.example.com. How can I set this up?

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  1. Editorial Team
    Editorial Team
    2026-05-20T00:14:18+00:00Added an answer on May 20, 2026 at 12:14 am

    Run from your favorite shell and terminal:

    sudo nano /etc/hosts
    

    Add this in a new line:

    127.0.0.1    *.example.com
    

    Press Ctrl+X to save.


    Make sure you do NOT delete the lines that are already there!

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