Bug 395409

$ ktorrent 
ktorrent: error while loading shared libraries: libKF5Torrent.so.6: cannot open shared object file: No such file or directory

$ apt show ktorrent
Package: ktorrent
Version: 5.1.0-0+16.04+xenial+build4
Priority: optional
Section: net
Maintainer: Neon CI <neon@kde.org>
Installed-Size: 4.746 kB
Depends: ktorrent-data (= 5.1.0-0+16.04+xenial+build4), libktorrent-l10n, libc6 (>= 2.14), libgcc1 (>= 1:3.0), libgeoip1, libkf5archive5, libkf5completion5, libkf5configcore5, libkf5configgui5, libkf5configwidgets5, libkf5coreaddons5, libkf5crash5, libkf5dbusaddons5, libkf5dnssd5, libkf5i18n5, libkf5iconthemes5, libkf5itemviews5, libkf5kcmutils5, libkf5kiocore5, libkf5kiofilewidgets5, libkf5kiowidgets5, libkf5krosscore5, libkf5notifications5, libkf5notifyconfig5, libkf5parts5, libkf5plotting5, libkf5service5, libkf5syndication5, libkf5textwidgets5, libkf5webkit5, libkf5widgetsaddons5, libkf5windowsystem5, libkf5xmlgui5, libktorrent6, libkworkspace5-5, libphonon4qt5-4 (>= 4:4.10.1), libqt5core5a (>= 5.10.0+dfsg), libqt5dbus5 (>= 5.10.0+dfsg), libqt5gui5 (>= 5.10.0+dfsg), libqt5network5 (>= 5.10.0+dfsg), libqt5webkit5, libqt5widgets5 (>= 5.10.0+dfsg), libqt5xml5 (>= 5.10.0+dfsg), libstdc++6 (>= 5.2), libtag1v5-vanilla, phonon4qt5
Suggests: geoip-database, krosspython
Homepage: https://www.kde.org/applications/internet/ktorrent/
Download-Size: 1.052 kB
APT-Manual-Installed: yes
APT-Sources: http://archive.neon.kde.org/user xenial/main amd64 Packages
Description: BitTorrent client based on the KDE platform


Need manually install package libkf5torrent6 for fix:

$ apt install libkf5torrent6


Please add libkf5torrent6 to depends list ktorrent package.