Cups 維護筆記

Sun, 30 Nov 2025 00:00:00 +0000

Fixing CUPS Print Server Issue on Ubuntu 24.04

Date: 2025-11-30 12:42 Tags: #Linux #cups #printserver

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.

Share an Old Printer on Your Local Network - CUPS

Sun, 16 Jun 2024 00:00:00 +0000

In this article, I will share with you about my second time installing CUPS on Ubuntu.

Requriement

Ubuntu 18.04 LTS Install on an Old Computer
Canon E410 Series Printer
Internet

CUPS Installation and Configuration Step by Step

Install CUPS on your system

#install cups
sudo apt-get install cups cups-pdf cups-bsd

Back up the configuration file

#copy configuration file
sudo cp /etc/cups/cupsd.conf cupsd.conf.bak

Editing the CUPS configuration file

#add user simith to lpadmin group
sudo usermod -aG lpadmin simith
#edit cupsd.conf
sudo vim cupsd.conf

Edited cupsd.conf contents.
（Configuration options not mentioned should be left as default.）

#allow access port
Port 63100
LogLevel warn
PageLogFormat
MaxLogSize 200

# Show shared printers on the local network.
Browsing on
BrowseLocalProtocols dnssd

# Web interface setting...
WebInterface Yes

# Restrict access to the server...
<Location />
 Order Allow,deny
 Allow @LOCAL
 Allow From 127.0.0.1
 Allow From 192.168.0.0/16
</Location>

# Restrict access to the admin pages...
<Location /admin>
 #access user simith can visit admin page
 Require user simith
 Order Allow,deny
 Allow @LOCAL
 Allow 127.0.0.1
 Allow From 192.168.0.0/16
</Location>

# Restrict access to configuration files...
<Location /admin/conf>
 AuthType Default
 Require user simith
 Order allow,deny
 Allow @LOCAL
 Allow 127.0.0.1
 Allow From 192.168.0.0/16
</Location>

# Restrict access to log files...
<Location /admin/log>
 AuthType Default
 Require user simith
 Order allow,deny
 Allow @LOCAL
 Allow 192.168.0.0/16
</Location>

Restart CUPS service and add to starup

sudo systemctl restart cups
sudp systemctl enable cups

End

Finally, you can visit the Ubuntu IP address and configuration

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