Answer by Pieber for Command not found error when initializing the tiller using `helm init`

1. Check that helm is installed with sudo snap install helm.

If installed, you should have something like that:

snap "helm" is already installed, see 'snap help refresh'

2. If helm is installed, then at the end of the file ~/.profile, add the following:

# Addition of snap packages to PATHPATH="$PATH:/snap/bin/"

3. Log Out / Log In to update the changes to ~/.profile
4. Check that the helm command works by testing it: helm version

If you still encounter the Command not found message, go to Preferences > Profile > Command and check Run command as a login shell if not checked.