Actually you are trying to perform command of ubuntu/mac on windows.

If you want to install NVM in windows then please refer this step by step guide.

Step by step guide

NVM For Windows

It looks like it's related to installing wget or curl with snap on Ubuntu:

https://github.com/nvm-sh/nvm/issues/2504

Here's what fixed it for me:

sudo snap remove curl
sudo apt install curl
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
nvm install node

It looks like it is installed. All OP needs to do is restart the terminal.

In my case, I've installed nvm with this instead

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash

Then restarted the terminal, and it is working.

Below will share the full process I've been through to install Node.js in WSL.

First of all, make sure one has WSL installed by following this. In this case OP already did that, so, just in case, would update the system's package

sudo apt-get update

Then, the following will install Node.js on WSL:

1. Install cURL (a tool used for downloading content from the internet in the command-line)

   sudo apt-get install curl
   

2. Install nvm (there are alternatives to nvm - see the first note below) (Source)

   curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash
   

   Verify the installation with command -v nvm (it should output nvm)

   

   Check Node versions available with nvm ls.

3. Install Node.js.

   There are various options to do that. Here will only consider installing:

   a) Current stable version (recommended for PRD):

   nvm install --lts
   

   

   b) Current release:

   nvm install node
   

4. Check Node versions available

   nvm ls
   

   

5. Verify Node.js installation node --version (or node -v).

   

6. Verify npm installation with npm --version

   

Notes

• One might have to restart the terminal after each installation.
• Additional trouble shooting notes on Linux.
• There are alternatives to nvm, such as n, fnm,... (more about it)
• Using Git on WSL.
• Helpful VSCode extensions.
• One can also use Node.js with Docker containers remote on WSL. Read more about it.
• For more about it, read Microsoft's official documentation.