This information is available at Orbit > Server > Information and Orbit > Server > Disk and Partitions.
In those menus you will have information about the operational system, but you can check it from the ssh console interface also.
To check the information through the ssh console try:
-
htop
-
top
-
free -h
-
dmesg -T
Check the Debian official manual for more information about those commands and more.
