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AppImageLauncher
Helper application for Linux distributions serving as a kind of "entry point" for running and integrating AppImages
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The ArchWiki is the bible of Linux resources, basic and advanced. The Gentoo wiki is also very good.
When running across AppImages, these are good because they can be portable apps, and they run on all platforms. But some distros don't include and integrate the AppImages like they do other types of apps. There is an APPIMAGE HUB website where you can download apps from the website. And you might need the help of an AppImageLauncher to integrate the AppImage apps if your distro doesn't do that out of the box.