Dash Riprock

Installing Armbian on Beelink X2 just to play with. Installs but don't know answer to privateuser@beelinkx2:~"$ __________? What's the answer. I had Arm on this a few years ago and removed it. But stuck on install. The line says... The command could not be located because 'usr/sbin' is not included in the PATH environment variable. This is most likely caused by the lack of administrative privileges associated with your user account. ???????