/usr/share/app-install/desktop/signon-ui-x11:signon-ui.desktop is in app-install-data 15.10.
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 8 9 10 11 12 13 14 15 16 17 | [Desktop Entry]
X-AppInstall-Package=signon-ui-x11
X-AppInstall-Popcon=1985
X-AppInstall-Section=main
Encoding=UTF-8
Version=1.0
Name=Account authentication
Comment=Login to online accounts
Exec=/usr/bin/signon-ui
Icon=
Type=Application
Terminal=false
NoDisplay=true
X-Ubuntu-Gettext-Domain=app-install-data
|