Can't reach my homeassistant vm using linux? works on Windows

hi,
i was installing my own homeassistant machine on a EXI host, all is running quite nice , was able to install it, add my own devices and energy measuremen systems.
i can login into the system using my windows-laptop and my android using the app…

but: i am trying to get all open-source: installed linux on my laptop and tried to reach homeassistant:8123 on linux the connection seems refused.
as i started with a dual-boot i booted back to windows: all is working.
from the linux side of the world on the same ip-adress in the same network i can’t reach my gui.

tried to search the forum for a start but couldn’t find any hints…

currently running:

Home Assistant 2023.3.6
Supervisor 2023.03.3
Operating System 9.5
Frontend-versie: 20230309.1 - latest

First - when you say, tried to reach - are you talking about via browser? or ping via command line?
When you tried the following:

do you mean https://homeassistant.local:8123 ? or exactly what you put in above?

Have you tried to connect to HA through IP:
http://[yourhaipaddress]:8123 ?

Have you tried to ping it from the command line?

First start with DNS (does it resolve ?)
e.g.: nslookup homeassistant
Then: try to ping the IP
If that all works you could try:
nc -zvn ‘HomeAssistant IP’ 8123

This should show something like:

hostname:~$ nc -zvn 192.168.10.10 8123
Connection to 192.168.10.10 8123 port [tcp/*] succeeded!