What can I do for hiding a program icon from the notification bar and Unity Launcher?
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possible duplicate of Remove icons from system tray – mchid May 04 '15 at 21:00
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depending on the application, sometimes you can run as a daemon – mchid May 04 '15 at 21:01
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which one do you want to hide? – mchid May 04 '15 at 21:03
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this may help http://webcache.googleusercontent.com/search?q=cache:GQa8pO4kS0YJ:gotoanswer.stanford.edu/unity_tray_icons-6132665/&hl=en&gl=us&strip=1 specifically, it talks about using dconf tools to whitelist or blacklist applications from the notification area – mchid May 04 '15 at 21:07
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The Unity Launcher: impossible, apart from unmapping, but then the window disappears as well. – Jacob Vlijm Jul 25 '16 at 20:05
2 Answers
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You can hide icon of running program from Launcher using CompizConfig Settings Manager.
To install it run:
sudo apt-get install compizconfig-settings-manager
To launch run:
ccsm
Then go to section Windows Management, enable Windows Rules. Then choose it, and add this line into "Skip Taskbar":
title=nameofwindow
Replace nameofwindow with the title of the window you want to hide.

Boris Lubimov
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2In Ubuntu 18.04 there is no option "Windows Rules". Every manual or instruction about ccsm I find on the internet just states 'check Windows Rules' as if it's as natural as water. What has changed and how do I work around it? (side note, all search results about "Windows Rules" I find are at least a year old, verified with my Google-Fu) – Mark Jeronimus Sep 14 '18 at 08:38
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