Getting Start Install WSL

Starting with the Nios® II EDS in the Intel® Quartus® Prime Pro Edition software version 19.2 and Intel® Quartus® Prime Standard Edition software version 19.1, the Cygwin component in the Windows* version of Nios II EDS has been removed and replaced with '''Windows Subsystem for Linux(WSL)'''
=Install Setps=
#Open PowerShell as Administrator 
#:[[File:Wsl 002.png|500px]]
#Run : <span style="color:green">Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux</span>
#:[[File:Wsl 003.png|900px]]
#Restart your computer when prompted.
# Install the Linux Distribution on your Windows 10, Please install Ubuntu 18.04 LTS for WSL from the flowing link: [https://www.microsoft.com/store/apps/9N9TNGVNDL3Q Ubuntu 18.04 LTS]
#:<span style="color:blue">'''Note''': Windows* 10 build version 16215.0 or higher is the recommended operating system version.</span>
#From the distro's page, select "'''Get'''"
#:[[File:Wsl 004.png|600px]]
#Now that your Linux distro is installed, you must initialize your new distro instance once, before it can be used. You will be prompted to create a new user account (and its password).
#:[[File:Wsl 005.png|600px]]
#Most distros ship with an empty/minimal package catalog. We strongly recommend regularly updating your package catalog, and upgrading your installed packages using your distro's preferred package manager. On Debian/Ubuntu, you use apt:
#:<span style="color:green">sudo apt update && sudo apt upgrade</span>
#:[[File:Wsl 006.png|600px]]
#Install additional distro packages required for Nios® II EDS using the following command:
#:<span style="color:green">sudo apt install wsl</span>
#:<span style="color:green">sudo apt install dos2unix</span>
#:<span style="color:green">sudo apt install make</span>
#:[[File:Wsl 007.png|600px]]
#Once the installation is complete, the WSL is installed.

=Reference=
* Section 2.1 "Installing Windows Subsystem for Linux (WSL) on Windows" of [https://www.intel.com/content/www/us/en/programmable/documentation/lro1419794938488.html#puq1561069548076 Nios II Software Developer Handbook]

=Issues=
== WSL2 ==
If users install to '''WSL2''' version, they may encounter the following problems:

[[File:Wsl issue 01.png|700px]]

To check the version of WSL installed, users can enter in the Command Prompt window:

 wsl -l -v

[[File:Wsl issue 02.png|400px]]

If the version of WSL is 2, you can enter the following command in the Command Prompt window to change the WSL version to 1.

 wsl --set-version Ubuntu-18.04 1
== deme_batch execute error ==

*Problem description:
*:When executing deme_batch, the following error occurred