Nagios Core – Modern UI Tweaks

Project Notes

✨ Features
Modern neutral dark background
Softer, more readable OK / WARNING / CRITICAL colors
Improved contrast for status counters
System UI font stack (Segoe UI / Roboto / Ubuntu / San Francisco)
Host names emphasized, services unchanged
Cleaner status summary layout
Better readability for Unhandled / Problem indicators
Fully dark-mode optimized
Consistent styling across:

avail.cgi
status.cgi
extinfo.cgi
cmd.cgi
tac.cgi
summary.cgi
and all standard Nagios Core pages
🎨 New Icon Set
In addition to the CSS modernization, this project introduces a new modern SVG icon set.

Redesigned icons include:

💬 Comments
⚙ Actions
📊 Status (alternative icon)
🔁 Flapping
Design Goals
Flat, minimal SVG style
Crisp rendering at 16–20px
Consistent stroke weight
Dark-mode friendly contrast
Lightweight and scalable
Icons replace the original bitmap-style images while preserving:

Original behavior
Original layout
Original functionality
No backend modifications required.

🛠 Installation
Replace the following files in your Nagios Core installation:

[nagios_root_path]/share/stylesheets/avail.css
[nagios_root_path]/share/stylesheets/cmd.css
[nagios_root_path]/share/stylesheets/config.css
[nagios_root_path]/share/stylesheets/extinfo.css
[nagios_root_path]/share/stylesheets/histogram.css
[nagios_root_path]/share/stylesheets/history.css
[nagios_root_path]/share/stylesheets/notifications.css
[nagios_root_path]/share/stylesheets/outages.css
[nagios_root_path]/share/stylesheets/showlog.css
[nagios_root_path]/share/stylesheets/status.css
[nagios_root_path]/share/stylesheets/summary.css
[nagios_root_path]/share/stylesheets/tac.css
[nagios_root_path]/share/stylesheets/trends.css
For the new icons, replace:

[nagios_root_path]/share/images/comments.svg
[nagios_root_path]/share/images/action.svg
[nagios_root_path]/share/images/status2.svg
[nagios_root_path]/share/images/flapping.svg
Restart is not required.
Just hard-refresh your browser (Ctrl+F5).