If I have a computer built for me at microcenter, can you install a Linux operating system in it?
Greetings, I am sorry, that is not a service we provide.
@Ian is correct here. We do not offer this in our service department, however, depending on the flavor of Linux that you're looking to install, the process is fairly simple.
Ubuntu offers installation instructions on their website.
When you do a custom build service with us, we will provide back all the boxes and packaging.
Our guide here on Community for picking out a motherboard is a great resource for common questions and suggestions regarding the how-to's of picking out a great motherboard! That can be found here: https://community.microcenter.com/discussion/2683/how-to-choose-your-parts-part-3-the-motherboard
In that price range, you can look over the following AM4 motherboards as listed in this guide:
Submit photos and a description of your PC to our build showcase
See other custom PC builds and get some ideas for what can be done
Services starting at $149.99