[bunderbunder]

Could go even easier by installing Git for Windows and using the included bash prompt.

It's a MinGW environment with very good factory configurations. It won't let you apt-get and run any old app, but it does get you all the goodness of a bash prompt and all the standard Unix command-line apps. All right there in Windows, without having to also learn and get comfortable in a new operating system.

[oblio]

If he has Windows 10 he could even go WSL, forgot about it.

[bunderbunder]

Could, but, IMO, if you don't need to run arbitrary linux apps then gitbash is the better option. It's more performant for file operations, and you don't have to deal with gotchas like, "Don't edit files that don't belong to WSL from WSL, only read them."