Thanks Meter 21
Join Date: Dec 2011
Location: Punta Gorda, Florida
Have you installed fastboot-tools and adb-tools from you Linux distro's repos? If not, then you need to do that. Forget that other stuff.
After you install your distro's fastboot-tools you put your tablet in recovery mode (vol-up & vol-down & power on). In a terminal on your Linux box, type either su if you have su privileges OR sudo fastboot devices to see that your tablet is indeed in mode to accept fastboot commands. Then type fastboot oem unlock if you are su, else type sudo fastboot oem unlock.