Fixing CUPS Print Server Issue on Ubuntu 24.04 Date: 2025-11-30 12:42 Tags: #Linux #cups #printserver Table of Contents What happened How I fixed it Prerequisites Step-by-step guide What Happened I was running CUPS 2.4.7 on Ubuntu 24.04. The client suddenly couldn’t print anything. After checking the server, I found that CUPS had shut down unexpectedly. How I Fixed It Logged into Ubuntu Checked the CUPS service status Restarted the required services Tested printing afterward to confirm everything was working again Prerequisites A keyboard A monitor Your Ubuntu user account and password Getting Started If you forgot your root password You can reset it through GRUB. 1. edit 'ro' to 'rw' rw init=/bin/bash 1. press Ctrl + X 1. press Enter to enter root bash ls /home \# check your username passwd {user} exec /sbin/init Check CUPS Status Use these commands to find the problem: systemctl status cups sudo cupsd -t \# display error information sudo cat /var/log/cups/error_log \# check cups log ## `TriggeredBy: cups.socket` and `Dependency failed` sudo systemctl stop cups.service cups.socket cups.path sudo systemctl start cups.socket sudo systemctl start cups.service sudo systemctl status cups