oracle gnu/linux 7 mate-desktop install doesnt install mate-screenshot so screenshots dont work #screenshot #alsamixer

after installing oracle gnu/linux mate-desktop you need to additionally run

# yum install mate-screenshot 
# yum install mate-system-monitor
# yum install mate-sensors-applet

additionally oracle gnu/linux mate-desktop doesnt have a volume control so run

$ alsamixer

from the command line instead