/usr/share/app-install/desktop/ksysguard:org.kde.ksysguard.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 18 19 | [Desktop Entry]
X-AppInstall-Package=ksysguard
X-AppInstall-Popcon=1618
X-AppInstall-Section=universe
Name=KSysGuard
GenericName=System Monitor
Exec=ksysguard %U
Icon=utilities-system-monitor
Type=Application
MimeType=application/x-ksysguard;
X-DocPath=ksysguard/index.html
Terminal=false
StartupNotify=true
X-DBUS-StartupType=Multi
Categories=Qt;KDE;System;
X-DBUS-ServiceName=org.kde.ksysguard
X-Ubuntu-Gettext-Domain=app-install-data
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