@kayyappan, tbh Ubuntu's adb and fastboot are seriously outdated....
Probably. I too thought so. Will update anyway. However that is till X2 LCD/Touch combo is replaced...... Having said that I wonder how TWRP is lacking on CLI. While on the subject I would like to mention 3.3.1-0-x2 CLI wipe of system is not possible. Thank you again for stretching your hand, yet again.