Tutorial for Linux (Connect IQ 3.2.3)

Can someone help me with setting up connect iq sdk + eclipse? Eclipse is not necessary, terminal scripts are fine as well as I don't need a lot of them and the eclipse plugin is very basic anyways.

It looks like the process is like following:

Additionally I did the eclipse SDK setup like described here: https://developer.garmin.com/connect-iq/sdk/

The first problem that comes up is that I can't start a SDK manager as I can't find one... Can someone help here?

PS:

I also found this link that contains the sdk manager https://developer.garmin.com/downloads/connect-iq/sdk-manager/connectiq-sdk-manager-linux.zip but this one does not start at all...