You have to edit /etc/sudoers file but you can no longer gain root access use sudo

"parse error in /etc/sudoers"

Requirements.

• EC2 A - (in order to fix)
• EC2 B - (B is Instance to attach EC2 A master volume)

How to

1. stop EC2 A
2. AWS console -Elastic Block Store-volumes detach EC2 A root volume
3. attach EC2 A root volume to EC2 B device /dev/sdj
4. sudo mkdir /vol-a
5. mount /dev/xvdj1 /vol-a