Run these commands in PowerShell or in the windows command line.

• Run Linux commands from the Windows command line.

wsl ls -alh
# this will run the ls command in the current directory.

wsl sudo apt update
# this updates the package lists for upgrades 
# for packages that need upgrading.

• Mix Linux and Windows commands

wsl ls -la | findstr "hello"
# this will use the ls command to list the contents of a dir 
# and then pipe the output to the findstr command in windows.

dir | wsl grep "hello"

• Open Windows software from Linux

notepad.exe
# this will open notepad

notepad.exe "C:\folder\hello.txt"
# open a file in notepad

explorer.exe .
# this will open the explorer in the current directory.

• Launch WSL from the windows command line

wsl 
# or
wsl.exe
# this will open WSL inside the current directory

exit 
# this will close WSL

• List installed distributions

wsl --list
# this will list all the installed distributions

wsl --list --running
# this will list all the running distributions

• Set a default distribution

wsl -s <DistributionName>, wsl --setdefault <DistributionName>

# exmaple 
# wsl -s Ubuntu

• Unregister and reinstall a distribution

Unregister means uninstall here.
While the distribution can be installed from the store it can not be uninstalled from the store.

wsl --unregister <DistributionName>

To reinstall, find the distribution in the Microsoft store and select "Launch".

• Set WSL 2 as your default version

wsl --set-default-version 2

• Know which distribution is running what version of WSL

wsl --list --verbose

• Set your distribution to use WSL 1 or WSL 2

wsl --set-version <distribution name> <versionNumber>

# example
# wsl --set-version Ubuntu 2

• WSL 2 your default architecture

wsl --set-default-version 2