ksnapshot software package provides screen capture tool, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ksnapshot
ksnapshot is installed in your system.
Make ensure the ksnapshot package were installed using the commands given below,
$ sudo dpkg-query -l | grep ksnapshot *
You will get with ksnapshot package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Graphics |
| Package | ksnapshot |
| Version | 4:4.12.2-2 |
| Description | screen capture tool |
| Sub Section | Graphics |