Adb and fastboot

Install

• apt-get install adb and fastboot

Help

• adb help 2>&1 | less
• fastboot help 2>&1 | less

adb services

• adb devices

List of devices attached
FMIFFQVCYDBASGEY	device

Unlock the Android device

• adb reboot bootloader

Verify the device is connected to your Ubuntu Desktop as follows

• fastboot devices

FMIFFQVCYDBASGEY	fastboot

Unlock the device as follows

• fastboot oem unlock

Reboot the device to Android as follows

• fastboot reboot

flash the TWRP recovery .img

• fastboot flash recovery TWRP_302_for_UMI_Touch_X_201605171.img

target reported max download size of 134217728 bytes
sending 'recovery' (11118 KB)...
OKAY [  0.895s]
writing 'recovery'...
OKAY [  0.257s]
finished. total time: 1.153s

Links

• http://rootmygalaxy.net/install-twrp-recovery-via-fastboot/