In this post I describe some of the settings and changes I made to make my Windows 10 and Ubuntu WSL into a fully fledged development environment. Here are the settings and tools I use for DevOps/SysOps on Windows.
The settings I describe here make that I can use tools like git, Ansible, Visual Studio Code, Testinfra and OpenSSH connections as good as possible in my workflow. Please share your thoughts, configurations and changes below in the comments, perhaps (likely) I and others can learn from them.
I have installed Microsoft Win32-OpenSSH (Win32 port of OpenSSH) Client for use with my Yubico YubiKey, as described in “How do I get my YubiKey to work with SSH in Windows 11 and Windows 10?“. Before Win32-OpenSSH version 18.104.22.168p1-Beta I had to rely on Git Bash, which is a great tool, but made things more complicated for me (yet another ssh client installed, upgrade broke OpenSSH FIDO/U2F helper, and so on).
All ssh connections into the network need to go through a bastion host. I added a ProxyJump configuration to my Windows
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Host bastionhost.example.com HostbasedKeyTypes firstname.lastname@example.org,email@example.com Compression yes User username ForwardAgent yes Host *.example.com ProxyJump bastionhost.example.com IdentityFile c:/users/username/.ssh/id_ed25519 IdentityFile /mnt/c/Users/username/.ssh/id_ed25519 User username ForwardAgent yes
Once the connection with the bastionhost is created, I can continue using regular ED25519 keys. Here you also see an IdentityFile directive pointing to my Windows .ssh/id_ed25519 file using a Linux path. That is because I share OpenSSH keys with WSL in Windows 10. Doing so there is no need for having separate key files for Windows and Linux/WSL. Or is there?
Did you know you can tunnel RDP connections through SSH? This comes in very handy if your Windows Servers are behind a firewall or bastionhost.
Linux/WSL OpenSSH config
I found that, while working with Visuals Studio Code, git and Ansible/testinfra, it sometimes is more convenient to have a separate ssh config file for Linux/WSL. For example some actions I perform have to go through a SOCKS5 proxy, and I need a ProxyCommand without breaking my current ssh configuration. So I created an additional file:
The munged ProxyCommand is:
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Host *.example.net ProxyCommand ncat.exe --proxy-type socks5 --proxy [::1]:4001 %h %p User username ForwardAgent yes
(note the different TLD “.net” here).
ncat.exe is the Windows netcat variant as found in nmap. You need to install this in Windows, not Linux/WSL. “Why no ProxyJump for this as well?”, I hear you ask. Well, when I run Testinfra tests with ProxyJump, I have to log on (pad the YubiKey) multiple times per test. That sucks :)
To support YubiKey OTP authentication, I added the following to my
.bashrc file to create an environment variable:
export SSH_SK_HELPER="/mnt/c/Program Files/OpenSSH/ssh-sk-helper.exe"
And the IdentityFile directive for my private keys:
Host bastionhost.example.com IdentityFile /mnt/c/Users/username/.ssh/id_ecdsa_sk_1 IdentityFile /mnt/c/Users/username/.ssh/id_ecdsa_sk_2 Compression yes User username ForwardAgent yes
If you’ve added this and try to log onto
bastionhost.example.com from within WSL, you notice the WinHello pop-up asking you to tap your YubiKey.
Reuse SSH connections
If you connect and disconnect a lot, for example you’re
git pull‘ing various repos, or running Testinfra tests, might benefit from keeping a connection open and reusing it. Unfortunately OpenSSH directives like ControlMaster, ControlPath and ControlPersist are not supported in Windows. But they are in WSL.
Add to your
.ssl/wsl_config file, under the
Host directive it concerns:
Host bastionhost.example.com ControlMaster auto ControlPath ~/tmp/%r@%h:%p.sock ControlPersist 60s
~/.ssh/ as your ControlPath if that folder is symlinked to Windows. For example if you share OpenSSH keys with WSL and Windows. Make sure
ControlPersist 60s makes sure your connection will be kept open for at most 1 minute. Use
ControlPersist Yes to keep it open until server will close the connection on its timeout.
Using this little piece of configuration prevents you having to touch / tap your YubiKey twenty times in a row while pulling in 20 repos or running multiple Testinfra tests, because you are reusing a single ssh connection. Neat :)
Keychain ssh-agent – Using SSH-Agent correctly in WSL 2
Partially taken from esc.sh’s post Using SSH-Agent the right way in Windows 10 WSL2.
Unfortunately you cannot integrate your Windows ssh-agent into WSL, and in WSL you’ll notice an agent session does not persist when you open a new terminal window. Long story short, install and use the package
sudo apt-get install keychain
If necessary, you can edit your
~/.bashrc and add:
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/usr/bin/keychain -q --nogui $HOME/.ssh/id_ecdsa_sk_1 /usr/bin/keychain -q --nogui $HOME/.ssh/id_ecdsa_sk_2 source $HOME/.keychain/$HOSTNAME-sh
-q there is no keychain greeting when you open a new shell.
My local code repos are in WSL, it’s just easier. Why? Well, I started doing that since we had double colon (
::) in file- and folder names in Puppet, something NTFS just won’t understand. And running Testinfra tests from within Visual Studio Code requires having your repo there.
Git needs some TLC, because it has to work with your newly created WSL OpenSSH config. If you don’t, git/WSL tries to use your Windows .ssh/config file, which lacks the ProxyCommand.
Add to your
export GIT_SSH_COMMAND="ssh -F ~/.ssh/wsl_config"
This tells git to always use this specific ssh command, and the
-F argument tells ssh to use this specific config file. Neat!
For Python I didn’t have to make a lot of adjustments, only that I didn’t want
__pycache__ files everywhere / everytime. For this I added to
With Testinfra you can write unit tests in Python to test actual state of your servers configured by management tools like Salt, Ansible, Puppet, Chef and so on. For use in Visual Studio Code, the path to
pytest need to be known (e.g in the path environment variable):
If you want to run a Testinfra test from within Visual Studio Code Remote, I found I have to provide the full path to my ssh config (
--ssh-config=/home/username/.ssh/wsl_config) and prefix the hosts argument with
ssh:// as protocol:
py.test --ssh-config=/home/username/.ssh/wsl_config tests.py --hosts="ssh://dbserver-01.dc03.example.net" -v --sudo
This took some trial and error.
cloudmonkey ☁️? is a command line interface (CLI) for Apache CloudStack. CloudMonkey can be use both as an interactive shell and as a command line tool which simplifies Apache CloudStack configuration and management.
In (regular) Linux/Ubuntu you can install CloudMonkey using
snap is available by default in Ubuntu 16.04 and up):
$ sudo snap install cloudmonkey
But unfortunately, this doesn’t work with WSL, as snap install fails. Luckily you can download standalone binaries and use CloudMonkey in Windows and Linux:
and this results in:
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# WSL 2 $ /bin/cmk version Apache CloudStack ? CloudMonkey 6.2.0 # Windows PS C:\Users\janreilink> cmk.windows.x86-64.exe Apache CloudStack ? CloudMonkey 6.2.0 Report issues: https://github.com/apache/cloudstack-cloudmonkey/issues (localcloud) cmk > version Apache CloudStack ? CloudMonkey 6.2.0 (localcloud) cmk > exit
Packer, by HashiCorp, lets you create identical machine images for multiple platforms from a single source configuration. Just download the required .zip file and launch
packer from your command line.
Visual Studio Code
Visual Studio Code (“VS Code”) is my editor / IDE of choice. It supports remote connections to Windows Subsystem for Linux (WSL). You can easiliy open a Linux/WSL folder using the command:
code . (this opens up the current folder in Visual Studio Code).
You can use
\\wsl$ as UNC path in Windows to access your Linux/WSL files from Windows Explorer.
VS Code Extensions
In VS Code, I have the following extensions installed:
- Remote – WSL, or I can’t connect with WSL
- GitLens – Git supercharged
- IIS Express (I do some dotnet/IIS stuff too sometimes – Umbraco, IIS)
- JSON Tools
- XML Tools
More OpenSSH in Windows Server and Windows 11 / Windows 10, the series
Here on Sysadmins of the North are more posts in a series of posts about OpenSSH in Windows. Whether it’s Windows Server or Windows 11 / 10. You may find these posts interesting:
- Tunnel RDP through SSH & PuTTY
- How to share OpenSSH keys with WSL in Windows 10
- Manually install OpenSSH in Windows Server
- Retrieve SSH public key from Active Directory for SSH authentication
- Windows 11/10 and WSL 2 DevOps environment
- YubiKey support in OpenSSH for Windows 11 and Windows 10
- Connect to a KVM host through an ssh tunnel and arbitrary port in Windows 11 and WSL 2
I hope you like it, let me know.
Conclusion and giveaway
In this post I showed you how you can turn Windows 11 and Windows 10 into a fully fledged development environment. It may take some getting used to, but if you’re as shortcut-Ninja as I’m (I alt-tab, ctrl-c/ctrl-v a lot), you can work pretty fast in this set up. Just don’t forget to run
sudo apt update and
sudo apt upgrade to keep Ubuntu updated.