This is a fork from the official Frontail. It is intended to work especially with openHAB log files.

• Ability to use Regular Expressions in the highlighting rules definition
• Use of html classes (instead of inline css rules) to define the appearance in a separate css file
• Custom highlighting rules, intended for openHAB
• New theming function, allowing to switch between light and dark mode in the same page (instead of having to choose among the two)
• Use of HTML Web Storage API to remember the last used theme

Note It can be that the paths differ with you, depending on the system version. Please adjust accordingly.

We install the necessary applications:

sudo apt-get install nodejs
sudo apt-get install npm

Then the frontail itself:

sudo npm i frontail -g

Get (linux-specific) frontail installation folder:

echo "$(npm list -g | head -n 1)/node_modules/frontail"

Copy modified files from this repo to the frontail installations dir, i.e.: /usr/lib/node_modules/frontail/

cd /etc/systemd/system/
sudo nano frontail.service

And in the editor that opens, paste the following script:

#!/bin/sh -

[Unit]
Description=Frontail

[Service]
ExecStart=/usr/lib/node_modules/frontail/bin/frontail --disable-usage-stats --ui-highlight --ui-highlight-preset /usr/lib/node_modules/frontail/preset/openhab_AEM.json --theme openhab_AEM --lines 2000 --number 200 /var/log/openhab/openhab.log /var/log/openhab/events.log /var/log/openhab/zwave.log
Restart=always
User=openhab
Group=openhab

[Install]
WantedBy=multi-user.target
Alias=frontail.service

You may need to change the User and Group values ​​to those that openHab runs under on your system. Save and then run the following commands:

sudo chmod 644 /etc/systemd/system/frontail.service
sudo systemctl daemon-reload
sudo systemctl enable frontail.service
sudo systemctl start frontail.service

If everything is done correctly, then by going to http://<server_addres>:9001 in the browser we will see the treasured logs.

It started as a personal modification on the Frontail installation in my openHABian, the full story is in the first post of this thread: https://community.openhab.org/t/frontail-custom-theme-coloring/116673

Long story short, some modifications where made to the following files:

web/index.html
web/assets/app.js

And some files were added:

preset/openhab_AEM.json
web/assets/styles/openhab_AEM.css

Thanks to the work of Ethan Dye this is also the standard Frontail version on OpenHABian starting from version 1.6.4: you can install it using openhabian-config, menu 21.

Thanks to Grzegorz Miasko who contributed with new rules and color theme. See his GitHub repository here.

I would also like to thank Schnuecks for helping me and giving some great suggestions. He also created a Repository for the installation via docker image, you can find it here.