Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
In GNOME, it’s really easy to take a screenshot of your system, you just hit Print Screen and a handy window pops up where you can save it.
For some reason, this functionality doesn’t work with KDE out of the box, but that doesn’t mean you can’t take screenshots.
There are many utilities that will allow you to take screenshots, but one that is built in to KDE is KSnapshot.
You can invoke KSnapshot by going to the K menu and choosing Graphics > KSnapshot or pressing Alt-F2 and typing ksnapshot.