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/usr/lib/cups/backend/usb does not exist anymore on my Ubuntu 16.04 LTS Xenial Xerus system. I cannot explain why. None of my two printers work anymore because of this.

Anyone can tell me how to create/reinstall this binary?

2 Answers 2

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hplip wasn't installed anymore on my system. Not sure why. I do have automatic updates configured on my Ubuntu 16.04 LTS Xenial Xerus server; maybe there was a problem and the package was dropped.

To fix the problem, I ran:

apt install --reinstall hplip

And now, both printers, HP LaserJet 6L and Brother MFC J615W work again.

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I got the same issue with my Canon printer. I don't really know what happened but re-installing cups did the trick:

sudo apt remove cups
sudo apt install cups

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