Colin Devroe

Reverse Engineer. Blogger.

What’s new in WSL in Windows 10

Tara Raj for Microsoft:

We’ve been documenting many of these new features and improvements on this blog over the last few months, but we’ve often been asked for a single document listing all the new improvements, and with FCU (version 1709, build 16299.15) shipping on October 17th 2017, we thought it was time to publish a list these improvements!

We’re coming up on our first year of using Windows Subsystem for Linux (WSL) at Condron Media. I mentioned in January of this year that we’ve been using it pretty extensively. Since then Tucker Hottes has been getting the insider updates (or, beta updates) of Windows 10 and has enjoyed the incredibly fast pace that Microsoft’s teams are on. If you look at the linked blog post you’ll see the improvements are myriad.

A request: If you’re a developer using Windows 10 and know about WSL do Microsoft a favor and let other Windows-using developers know. Tucker and I are always amazed at the number of developers that have no idea about WSL still. In fact, just yesterday we met one and made sure to tell them about it.

To put this in perspective; Tucker is on Windows 10 and I’m on macOS. Yet, we use nearly the same development environment, configuration, tools, etc. This allows us to collaborate in a way that was previously much more difficult. Microsoft is doing great work on WSL and more developers need to know.

How we got Linux on Windows

Brian Jepson writing about the Windows Subsystem for Linux:

But there’s a lot more going on. First, WSL is really a new infrastructure for Windows that implements a Linux kernel-compatible ABI (Application Binary Interface). It allows Windows to run unmodified ELF-64 binaries, and is distribution-agnostic. When you configure it, WSL downloads and runs an (unmodified!) Ubuntu cloud image, but WSL is designed to support other Linux distributions as well. There are a few system calls not yet implemented, but that list gets smaller and smaller with each Insider Preview Release of Windows.

Much of what Jepson discusses here is above my pay grade, however, in the most simple terms, this is what the WSL is. WSL, allows any Unix distro to “talk” to Windows in such a way that makes the Unix kernel indistinguishable for an actual Linux kernel. So a Linux app doesn’t need to be modified at all to run on Windows 10 with WSL enabled. And while there are some things that still don’t work on WSL that list is shrinking fast.

We’ve been using WSL at Condron Media for weeks and have had great success. We’ve run into a few snags but Tucker Hottes has reported those via Twitter and oftentimes sees an update to Windows within a week or so. Microsoft is really killing it with this.