[SOLVED] How do I install heroku on ubuntu?

I am trying to install heroku and for that it says i need to run this:

sudo snap install heroku --classic

but when i run that i get snap: command not found. when i looked up how to solve this it said i had to do this:

sudo apt update
sudo apt install snapd

but this does not work as well because it gives this:

apt: invalid flag: update

What do i do? How do i install heroku on aws cloud 9 linux?

To install heroku on ubuntu,

curl https://cli-assets.heroku.com/install-ubuntu.sh | sh

But, this version does not autoupdate and must be updated manully via apt-get.