WSL¶

install¶

doc¶

https://docs.microsoft.com/en-us/windows/wsl/install#update-to-wsl-2

update¶

wsl --update

wsl2¶

to check version

# in command line
wsl -l -v

# in wsl
uname -r

to change to WSL2 - wsl --set-version Ubuntu 2 - troubleshoot - the virtual environment problem - search turn windows features on or off and check virtual machine platform - https://github.com/microsoft/WSL/issues/5363

wslg¶

https://github.com/microsoft/wslg

requirements
- Windows build 21364+
  - check with ver in cmd

X server¶

See https://hackmd.io/@billsun/SyL3pzzQm

or just use wslg

Meta Commands¶

list all running distros¶

wsl -l -v (in command line)

terminate¶

wsl -t DISTRO to terminate DISTRO

wsl --shutdown to terminate all

troubleshooting¶

x server¶

https://github.com/microsoft/wslg/wiki/Diagnosing-%22cannot-open-display%22-type-issues-with-WSLg
echo $DISPLAY → :0
- export DISPLAY=:0
ls -la /tmp/.X11-unix → lrwxrwxrwx 1 root root 19 Dec 29 01:04 /tmp/.X11-unix -> /mnt/wslg/.X11-unix
- x11 display socket
- ln -s /mnt/wslg/.X11-unix /tmp/.X11-unix to recreate
ls /tmp/.X11-unix → X0
- check if x server's running

temporary resolution error¶

Behavior

For WSL2, /etc/resolv.conf will be removed on every start up, however, it need to know how to resolve your request to work.

Solution

You can give it nameserver 8.8.8.8 to use Google's DNS service.

sudo rm /etc/resolv.conf
sudo bash -c 'echo "nameserver 8.8.8.8" > /etc/resolv.conf'
sudo bash -c 'echo "[network]" > /etc/wsl.conf'
sudo bash -c 'echo "generateResolvConf = false" >> /etc/wsl.conf'
sudo chattr +i /etc/resolv.conf

and then restart wsl

https://github.com/microsoft/WSL/issues/5420#issuecomment-646479747

memory problem¶

it won't return your memory once it allocated it, until termination

ref - https://blog.simonpeterdebbarma.com/2020-04-memory-and-wsl/ - https://github.com/microsoft/WSL/issues/4166

or sudo sh -c 'echo 1 > /proc/sys/vm/drop_caches'

per https://medium.com/hungys-blog/clear-linux-memory-cache-manually-90bec95ea003