I solved my problem by adding repos below in /etc/apt/sources.list. they were missing in my os image.
deb http://ca.archive.ubuntu.com/ubuntu/ precise-updates main restricted deb http://ca.archive.ubuntu.com/ubuntu/ precise-updates universe deb http://ca.archive.ubuntu.com/ubuntu/ precise-updates multiverse
I solved my problem by adding repos below in /etc/apt/ sources. list. they were missing in my os image.
deb http:// ca.archive. ubuntu. com/ubuntu/ precise-updates main restricted ca.archive. ubuntu. com/ubuntu/ precise-updates universe ca.archive. ubuntu. com/ubuntu/ precise-updates multiverse
deb http://
deb http://