Please paste the exact and complete command lines you’d like me to update the instructions to, so a user can copypasta and have a guaranteed RT ready for use.
Certainly! Here’s the full steps from the current downloads page that have been updated with dnf. It would probably be sufficient to update the Fedora 24 and 25 pages since Fedora 23 is EOL.
To install RawTherapee follow these simple steps:
1. Open the terminal
2. Paste this code into it:
# sudo dnf config-manager --add-repo http://download.opensuse.org/repositories/home:rawtherapee/Fedora_24/home:rawtherapee.repo
3. To install RawTherapee using Gtk+ 2:
# sudo dnf install rawtherapee
or to install the Gtk3 version:
# sudo dnf install rawtherapee-gtk3
RawTherapee should now be installed and ready for use.