Most printers will be automatically added to the computer. If not, to add a printer to your System76 Computer, press the super key and type the word Printers, then choose the Printers application in the search box. In the Printers Application, click the Add a Printer… button and a box will pop up with different options. Wait a few seconds for printers to appear in the Device List.
Select the correct printer and click Add.
First in the Software & Updates settings go to the Other Software tab, and check the first item, Canonical Partners. Then, after closing the Software & Updates program, add the driver with this command for HP:
sudo apt install hplip
And this one for Epson:
sudo apt install lsb printer-driver-escpr
If the printer stops working, open the Printers Application again and click the gear icon, and select Remove Printer to remove the printer and its settings. Repeat the steps above to add the printer and try printing the test page again. This process usually resolves many printing issues.
To look at the CUPS (Common Unix Printing System) configuration and status window, please open this webpage:
The status window will show current print jobs, detected printers, and other information about the printing system.
sudo apt install --reinstall cups cups-client
This will reinstall CUPS, the main printing software, which can help with generic issues.
sudo apt install --reinstall system-config-printer-*
This will reinstall the system control panel if the settings are not available.