Raspberry pi 2 Emergency mode ! please help!

Hello ,

I have a raspi 2 , 5v 3000mA power supply extra for raspi , ive installed ubuntu mate 15.10 but after a while it doesnt boot up normally , it booots up to emergency mode . i dont know what to do . !?

Take the card out, put the SD card to a slot in another computer and run fsck on the PI_ROOT partiton.