I think I may have figured out how to do things from the virtual terminals to affect the X screen.
The vt for X is 6 so we can do:
chvt 6 to switch to the virtual terminal 6
Next we need to have a little delay, so let's add sleep 4 (you can also use 2 if you think that's a bit faster)
We also need to add "export DISPLAY=:0" to set the X display.
Then to change the user, we use "sudo -u knoppix "
So to do xrandr and change the resolution: (this is pretty useful when you mess around with screen resolutions that cause a blank screen)
Hit CTRL+ALT+F4 to switch to VT 4: then type
chvt 6; sleep 4; export DISPLAY=:0; sudo -u knoppix xrandr
chvt 6; sleep 4; export DISPLAY=:0; sudo -u knoppix xrandr --output HDMI-1 --mode 800x600
To launch terminator:
chvt 6; sleep 4; export DISPLAY=:0; sudo -u knoppix terminator &
To open the main menu:
chvt 6; sleep 4; export DISPLAY=:0; sudo -u knoppix lxpanelctl menu
Seagate ST8000NM0055 8TB 7200RPM 256MB SATA 6.0 Gb/s 3.5" Enterprise Hard Drive
$41.41
HITACHI HUS724040ALA640 4TB 7200RPM 64MB SATA 6.0Gb/s 3.5" HARD DRIVE ZERO HOURS
$52.00
Seagate ST8000NM0055 8TB 7200RPM 256MB SATA 6.0 Gb/s 3.5" Enterprise Hard Drive
$34.14
Western Digital Ultrastar DC HC510 8TB 3.5" SAS 12Gb/s 7200RPM HDD
$59.99
HGST Ultrastar DC HC520 12TB SATA 6Gb 256MB 3.5" Enterprise HDD- HUH721212ALE601
$89.99
HGST Ultrastar HE10 10TB SATA 6.0Gb/s 7200 3.5" Datacenter HDD - HUH721010ALE601
$79.99
Seagate ST12000NM0127 12TB 256MB 7200RPM 3.5" SATA 6.0Gb/s Enterprise Hard Drive
$94.99
WD Ultrastar DC HC530 14TB SATA 6G 3.5" 7200RPM Enterprise HDD - WUH721414ALE604
$119.99
Seagate ST1000VM002 1TB 64MB SATA6Gb/s 3.5" (Low Power) Hard Drive -PC, CCTV DVR
$24.99
12TB Western Digital White Label Hard Drive WD120EDAZ 3.5"
$75.00