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I installed Dolphin successfully, its icon is in Application → System Tools and it works well.

But, in Settings → Details → Default Applications there's everything else just not File Manager. Why this? Isn't managing files one of the main task`s on a desktop OS? And aren't personal file handling preferences as numerous as different OSs?

I found:

but those didn't help me in my case. How can I achieve this somehow else?

Gerold Broser
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1 Answers1

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Found this here

Install xdg-desktop-portal and xdg-desktop-portal-kde.

Open the terminal and run the commands:

xdg-mime default org.kde.dolphin.desktop inode/directory

xdg-mime default org.kde.dolphin.desktop inode/directory application/x-gnome-saved-search

Insert the option to the file defaults.list:

echo "inode/directory=org.kde.dolphin.desktop" >> $HOME/.local/share/applications/defaults.list

Run the command sudo nano /etc/environment and insert GTK_USE_PORTAL=1;

Restart your computer.

Oo'-
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pst007x
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    I fixed your comment. No need to modify the root's `default.list`, he can define the user's `default.list`. Remember you need to clear the caches and the cookies. I am the author of the tutorial. – Oo'- Feb 18 '22 at 21:36