Linux is a term for a large number of different distributions in various forms. The possibilities to support Linux on end user devices are very limited. Primary supported operating systems are Windows and macOS.
Download "CQue DEB Driver for Linux": Link
Open and install the package "cque-en"
Enter "Print Settings" in the search and open it.
Click on "Add"
Select "Network Printer" -> "LPD/LPR Host or Printer"
Enter in Host field: "its-uprint-uxp1.its.unibas.ch"
Enter in Queue field: "UNIprintLPR"
Click "Forward"
"Select printer from databse" -> "Canon"
Select "Forward"
Select Models "iR-ADV C5550/5560 III" -> Driver ""Canon iR-ADV C5550/5560 III PS [en]"
Select Forward on "Installable Options"