I am trying to find a good asset management solution (gpl) for our hospital (we should take care of furniture, medical machines and personal computers), of course working on Ubuntu and web-based.
Any hints?
Sounds like what you need is a fixed asset management system:
Try glpi from the repositories or one of these sourceforge projects:
http://sourceforge.net/projects/fams/
GLPI is available in the Ubuntu repository. It's a pretty well-made FOSS asset management system.
sudo apt-get install glpi
GLPI and their Generic Object plugin is the way to go. Just don't use the packaged glpi since its pretty outdated.
You just need a webserver , php and mysql/mariadb.
You can find the latest prerequsites here: https://glpi-install.readthedocs.io/en/latest/prerequisites.html