If you need to process images, use darktable and rawtherapee
To install in Xubuntu or Ubuntu, open a terminal window and enter the following commands:
$ sudo apt-get install darktable rawtherapee <enter>
Once you are done, go ahead and process photographs like a professional. Need I say that this is a good combination to substitute for LightRoom available at https://lightroom.adobe.com/, that costs a fortune and is not available for Linux
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