Flameshot
Drop-in replacementFreeThe closest thing to the Greenshot routine. Select a region, annotate it on the spot, then copy or save. Free and in every app store.
Your files: Saves ordinary PNG files.
Does Greenshot run on Linux?
Verdict: No
No. Greenshot is made for Windows, with a separate Mac version, and there is no Linux build. Flameshot and ksnip do the same job of grabbing a region and marking it up.
The Greenshot download page offers a Windows version and a Mac version from the App Store. Linux is not among them.
The habit Greenshot gave you carries over though. Flameshot is the closest match. Press a key, drag a box around what you want, then draw arrows, boxes and text on it right there before you save or copy it. That is almost exactly the Greenshot routine.
ksnip is worth knowing about too. It does the same capture and annotation and adds blur and pixelate, which is how you hide an address or an account number before sending a screenshot on. It also runs on Windows, so if you keep both machines you can use one tool on each.
Your existing screenshots are plain PNG files and need nothing done to them. Greenshot never stored anything in a format of its own.
What to use instead of Greenshot
ksnip
Close matchFreeSame idea with more tools, including blur and pixelate for hiding private details. There is a Windows version as well.
Your files: Saves ordinary PNG files.
GNOME Screenshot
Close matchFreeThe plain capture tool already on GNOME desktops. Nothing to install, but no annotation, so you mark images up elsewhere.
Your files: Saves ordinary PNG files.
This doesn't have to stop you
One stubborn program doesn't have to decide the whole question. You can keep Windows on the same PC and restart into it only when you need Greenshot. Everything else you do can move.
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