Installing Supabase CLI - how?!

CLI

I am getting quite confused about the Supabase CLI, and its installation process. According to https://github.com/supabase/cli all I have to do is

npm i supabase

npm i supabase

, but this does not seem to work

I thought about installing it with

npm install -g

npm install -g

, but I found a github ticket saying that this is not supported.

The only way that I have managed to make it work is with

npx supabase

npx supabase

but that doesnt really install the CLI, and I would like that. How can I do it?

(I am in Ubuntu)