/usr/share/application-registry/gdebi.applications is in gdebi 0.9.5.5+nmu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | gdebi
command=gdebi-gtk
name=Install Package (gdebi)
can_open_multiple_files=false
expects_uris=false
requires_terminal=false
mime_types=application/x-deb
|