Ubuntu – Ubuntu Touch Install Problem

Well, a real dual boot like with a pc is not possible, but maybe this app works.

It runs under rooted Android and you can select what ROM to boot next reboot. Maybe worth a try

You have several methods at your disposal to wipe your /data partition:

Through Android

• Boot into Android normally.
• Go into Settings > Backup & reset > Factory data reset
• This will perform a Factory Reset which basically wipes /data and cache partitions, but keeps /system in tact.

Through Fastboot

• Boot your device into bootloader mode: power-down your device, and reboot into the bootloader by holding the power button and the volume down button together for several seconds.

• You can also reboot into bootloader mode via adb by executing the following command (while your device is booted into Android, with USB Debugging turned on):

  adb reboot-bootloader

• Once you're in the bootloader, run the following fastboot command:

  fastboot erase data

Through Recovery

• Boot your device into bootloader mode (follow instructions above).

• Once you're in the bootloader, use the volume buttons to select Recovery, and press the power button to reboot into recovery.

• You can also reboot into recovery mode via adb by executing the following command (while your device is booted into Android, with USB Debugging turned on):

  adb reboot recovery

• If you have the stock <3e> recovery or ClockworkMod, select wipe data/factory reset option. Use the volume buttons to navigate to it, and the power button to select it and start the wipe.

• If you have TWRP, tap on Wipe, and select Factory Reset.

Good luck!