Problem rooting intex y2 aqua 1gb I am trying to root my phone using Ubuntu.
 When I try


  adb reboot bootloader


My device boots into fastboot mode

When I try 


  fastboot devices


It list my device.
But when I try 


  fastboot oem unlock 


It freezes with 3 dots.
Any idea what is the issue?
Not every device is rooted the fastboot way like Nexus phones do, especially when the device in question is a MediaTek one.

I did a quick search and the result checks out: you'll need MediaTek's scatter flashing tool. Read this: LINK: XDA-Developers

I don't have the device so it's up to you to verify whether this works. Either way, do hang around XDA and other forums often for this sort of info.