try kde-spectacle it replaces KSnapshot
apt-cache show kde-spectacle
Package: kde-spectacle
Version: 16.04.2-1
Installed-Size: 1280
Maintainer: Debian/Kubuntu Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Depends: libc6 (>= 2.14), libkf5configcore5 (>= 4.97.0), libkf5configgui5 (>= 4.97.0), libkf5configwidgets5 (>= 4.96.0), libkf5coreaddons5 (>= 4.100.0), libkf5dbusaddons5 (>= 4.97.0), libkf5declarative5 (>= 4.96.0), libkf5i18n5 (>= 4.97.0), libkf5kiocore5 (>= 4.96.0), libkf5kiowidgets5 (>= 5.5.0+git20150101.0309+15.04), libkf5notifications5 (>= 4.96.0), libkf5screen-bin (>= 4:5.6.2~), libkf5screen7 (>= 4:5.6.2), libkf5service-bin, libkf5service5 (>= 4.96.0), libkf5widgetsaddons5 (>= 4.96.0), libkf5windowsystem5 (>= 4.96.0), libkf5xmlgui5 (>= 4.96.0), libqt5core5a (>= 5.6.0~beta), libqt5dbus5 (>= 5.4.0~), libqt5gui5 (>= 5.4.0~), libqt5printsupport5 (>= 5.4.0~), libqt5qml5 (>= 5.0.2), libqt5quick5 (>= 5.0.2), libqt5widgets5 (>= 5.4.0~), libqt5x11extras5 (>= 5.6.0), libstdc++6 (>= 4.1.1), libxcb-cursor0 (>= 0.0.99), libxcb-image0 (>= 0.2), libxcb-util0 (>= 0.3.8), libxcb-xfixes0, libxcb1
Description-en: Screenshot capture utility, replaces KSnapshot
Spectacle captures images of the screen. It can capture the whole screen,
a specified region, an individual window, or only part of a window.
Description-md5: 7a50c6691e4aee93f0ff3125995c1771
Homepage: https://projects.kde.org/projects/kde/kdegraphics/spectacle