Ubuntu 15.04 – Welcome to Emergency mode! – FSCK solution

From: http://askubuntu.com/questions/646414/welcome-to-emergency-mode-think-it-is-a-fsck-problem

Boot into Ubuntu Live DVD/USB

In terminal:

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sudo -i
fdisk -l

Identify where your root (/) partition is, then:
In this example, assume /dev/sda1

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umount /dev/sda1
fsck -y /dev/sda1
reboot