Shortcut for "Project View | Right click on file | Open in | Files"

Hello, for me the "Show in files" action from Settings | Keymap | Other works fine after I assign a shortcut to it. As there's no default dedicated one, I tried Ctrl+Alt+Shift+. in IDEA 2021.3.1 on Ubuntu 21.04 Gnome.

Could you please confirm it does not work for you?

If so, what shortcut has been assigned to it and what is your keyboard layout? 

Thank you for your reply, but it doesn't work.  I have assigned Ctrl+Alt+Shift+x to it (I also tried  ctrl+alt+shift+z). It's also strange, that there are two entries for Show in Files (both in Other).

IntelliJ IDEA 2021.3 (Community Edition)
Build #IC-213.5744.223, built on November 27, 2021
Runtime version: 11.0.11+0-adhoc..source amd64
VM: OpenJDK 64-Bit Server VM by Oracle Corporation
Linux 5.11.0-43-generic

Does it help if you enable the "Use national layouts for shortcuts" option (shown on your screenshot) and restart the IDE?

It's also strange, that there are two entries for Show in Files (both in Other).

That's a known issue, see IDEA-85335. 

Thank you Ekaterina, the problem is on my side. The  "Open in file" action doesn't even work with a mouse click on the context menu (screenshot in first post). This issue can be closed.