Add printers to Ubuntu clients not possible via CUPS

[boospy]

The RedHat Method is really unsecure. Passwörd in plaintext… not really. So here the final solution:

Printing from Ubuntu 20.04 did no work over UCS Cups - Job held for authentication

So now it is solved. It works perfectly. Never install a printer manualy on an linuxclient. Here is my documentation in German.