How to take a screenshot in Linux operating system

Press the key PrtSc

using this button, you can take a screenshot or run a program that makes it in any of the Linux desktops (KDE, MATE, Gnome, Cinnamone, Budgie, LXDE and other)

The PrtSc button is located in the upper right corner of the keyboard, as shown in the figure. Often located next to the ScrLk and Pause buttons.