Cups and Old Printers
Posted on June 1, 2026, 3:56 pm By

Cups can fail to allow you to print with the error

"cups-pki-expired"

If this happens, you can either update your printer’s SSL certificates (recommended if the printer is public at all) or, if it is a private printer on a private lan you can bypass it by adding the following line to the file /etc/cups/client.conf

AllowExpiredCerts Yes

Be sure to stop cups before adding it and start it after and you should be able to print again!

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Agathezol is a gamer, programmer, father, husband, and musician. When he's not writing blog posts nobody reads he generally writes protocol stacks, network code, and core telecommunications software but has dabbled in game design, web programming, mobile device software, and desktop software.

Categories: Linux