I bought HP Laser MFP 135a black and white scanner/printer. I am new in Ubuntu and I use Ubuntu 18.04 LTS. I tried to open localhost:631 by installing CUPS in Terminal as seeing in one youtube video but no suceed. I do not know much to do. I use printer/scanner via USB. Could someone be kind and help me to set to work both scanner and printer.

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Author: Alain-Alain