Open your terminal and run: sudo apt update && sudo apt install hplip hplip-gui For Fedora: sudo dnf install hplip hplip-gui For Arch Linux: sudo pacman -S hplip 2. Configure Your Printer

From that day on, the HP LaserJet Pro 400 M401dn became the unofficial mascot of the newsroom. Marcus even wrote a short shell script that checked toner levels via SNMP:

Follow the prompts to finish the setup and print a test page. 3. Manual Installation (If Repo Version is Old)

Avahi (mDNS) conflict or incorrect URI. Solution: Find the correct URI:

He’d tried the obvious first. He plugged in the USB cable. Nothing. He connected via Ethernet. The router saw it, but Linux didn’t. He even tried the wireless setup menu on the printer’s tiny two-line LCD screen, pressing ‘OK’ through a labyrinth of TCP/IP settings that hadn’t been updated since 2013.

“Linux printing test page — HP LaserJet Pro 400 M401dn”