WSL2

Links

• https://docs.microsoft.com/en-us/windows/wsl/wsl-config
• https://medium.com/@joe.njenga/47-claude-code-wsl-tricks-every-windows-user-should-know-5d42aaee2d93

WSL startup speed

wsl --shutdown
wsl --list --running
wsl "dmesg"

Config

• https://learn.microsoft.com/en-us/windows/wsl/wsl-config#configuration-settings-for-wslconfig

/etc/wsl.conf

[boot]
systemd=false

[automount]
enabled = false       # /mnt/C

C:\Users\UserName\.wslconfig

[wsl2]
memory=4GB      # Limits VM memory in WSL 2 to 4 GB
processors=2    # Makes the WSL 2 VM use two virtual processors

[experimental]
networkingMode=mirrored    # IPv6 support!!!

Networking

Network bridge to Ethernet Adapter

• Enable Hyper-V

Dism /online /enable-feature /featurename:Microsoft-Hyper-V -All /LimitAccess /ALL

• Install Hyper-V Windows features - "Turn Windows features on or off":

Hyper-V Management Tools > All
Hyper-V Platform > All

• Script after every logon

set-vmswitch -name wsl -NetAdapterName Ethernet

• get new DHCP IP for WSL2

sudo ip addr flush dev eth0
sudo dhclient eth0

WSL IPs

wsl hostname -I
netsh interface ipv4 show neighbors

fstab

z: /mnt/z drvfs rw,relatime 0 0

mount network share

mount -t drvfs '\\server\share' /mnt/share

Docker in WSL

• install docker on linux
• add to ~/.bashrc

# Start Docker daemon automatically when logging in if not running.
RUNNING=`ps aux | grep dockerd | grep -v grep`
if [ -z "$RUNNING" ]; then
    sudo dockerd > /dev/null 2>&1 &
    disown
fi

Other

Using New Windows Terminal

• profiles.json
  • set defaultProfile to Ubuntu
  • for linux home dir:

"commandline" : "wsl.exe ~ -d Ubuntu-20.04",

Show DHCP Leases

wsl.exe ~ -d Ubuntu ssh -t root@router cat /tmp/dhcp.leases && exec bash

Running Linux Commands

• using bash.exe

bash.exe -c "jupyter-notebook ; /bin/bash"

• using wsl

wsl jupyter-notebook &

Multiple Distro Instances

* Settings -> Apps -> Ubuntu -> Advanced -> Reset to initial state

wsl --list
wsl --export Ubuntu-20.04 Ubuntu_fresh_rootfs.tar.gz

wsl --import DistroName InstallationPath Ubuntu_fresh_rootfs.tar.gz
wsl -d DistroName

• alternative: https://github.com/yuk7/wsldl

Alpine + WSL 1 for quick SSH connections

https://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/x86_64/
download alpine-minirootfs-...-x86_64.tar.gz 
save at C:\WSL

mkdir C:\WSL\alpine
cd C:\WSL
wsl --import Alpine C:\WSL\Alpine\ alpine-minirootfs-...-x86_64.tar.gz --version 1

wsl -d Alpine

apk update
apk add openssh sudo

adduser marcluer
adduser marcluer wheel
visudo

# uncomment
%wheel ALL=(ALL:ALL) NOPASSWD: ALL
# :wq to save

touch /etc/wsl.conf
vi /etc/wsl.conf
[user]
default=marcluer