In the latest update of windows, specifically The anniversary update we can now play with a stripped down Ubuntu shell that exposes Bash, enough to excite any Linux user that has to use windows 10 on a daily basis. On windows the new system is known as WSL (Windows Subsystem for Linux) and is still in beta and does have small bugs that we will cover at the end

So how do we activate this new feature

First go to the windows 10 control panel and click update & security, next click for developers and enable developer mode

Warning: This will enable dev mode, loosening checks on side loaded apps be aware of these risks

Next go to programs and features and click enable and disable windows features and scroll until you find "Windows Subsystem for Linux (Beta)" tick it and reboot

now you can either search for bash and the find it this way or go to CMD and type bash and walk through the setup steps.

Bugs

ifconfig will complain as it can't use the dev files that Linux needs.

Warning: cannot open /proc/net/dev (No such file or directory). Limited output.

apt-get may fail with:
(13: Permission denied)

bug fixes are underway there is even an official github repo for reporting bugs
GitHub - BashOnWindows

Update: apt-get failure may happen if an antivirus detects the traffic and misidentifies it.