In December 2015, KSnapshot has been replaced by Spectacle
apt policy kde-spectacle ksnapshot
kde-spectacle:
Installiert: 16.04.3-1
Installationskandidat: 16.04.3-1
Versionstabelle:
*** 16.04.3-1 500
500 http://httpredir.debian.org/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
ksnapshot:
Installiert: (keine)
Installationskandidat: 4:16.04.3-1