Hi
@laex2 I know nothing about "lpr", but I google for it and found this
https://www.computerhope.com/unix/ulpr.htm Basically it states that you should do the following:
1. Manually install CUPS, and lpr itself
sudo apt-get update && sudo apt-get install cups cups-client lpr
This command will install the Common Unix Printing System on your system. You should now be able to set up CUPS by directing any web browser to the address:
http://localhost:631 doing so will open a web-based CUPS configuration screen.
2. From the command line, add your user to the group lpadmin with the command:
sudo adduser <yourusername> lpadmin
This command will add you to the group of users allowed to administer printers on your system. Now go back to the CUPS web administration panel, and under the administration tab, select "Add Printer." You will be prompted for your username and password, and you should be able to set up a new printer.
I don't know if you already tried that, in any case you could simply read the article for yourself and see if there's something else you can use from it.
EDIT: I also found
this post which seems it might be of some help, I just tried what it says and I saw a lpr option in the cups configuration page. Again, I don't know if you tried/did this.
I also searched at the
Ubuntu package site for /usr/bin/lpr as suggested in
this post and found these three packages available for download:
cups-bsd,
lpr,
lprng.
Hope this helps!