xfce4-screenshooter: Cannot open display: Try xfce4-screenshooter --help to see a full list of available command line options.

Usage: xfce4-screenshooter [OPTION?] Help Options: -h, --help Show help options --help-all Show all help options --help-gtk Show GTK+ Options Application Options: -c, --clipboard Copy the screenshot to the clipboard -d, --delay Delay in seconds before taking the screenshot -f, --fullscreen Take a screenshot of the entire screen -m, --mouse Display the mouse on the screenshot -o, --open Application to open the screenshot -r, --region Select a region to be captured by clicking a point of the screen without releasing the mouse button, dragging your mouse to the other corner of the region, and releasing the mouse button. -s, --save Directory where the screenshot will be saved -u, --upload Host the screenshot on ZimageZ, a free online image hosting service -i, --imgur Host the screenshot on Imgur, a free online image hosting service -V, --version Version information -w, --window Take a screenshot of the active window --display=DISPLAY X display to use