Upgrade 14 to 16.04: required dependency 'dpkg (>= 1.17.5ubuntu5.6)' is not installed. Help?
Update the dpkg using the following steps:
Step 1.
wget http://security.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.17.5ubuntu5.6_amd64.deb
OR (Depending on your system)
wget http://security.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.17.5ubuntu5.6_i386.deb
Step 2.
sudo dpkg -i dpkg_1.17.5ubuntu5.6_amd64.deb
OR
sudo dpkg -i dpkg_1.17.5ubuntu5.6_i386.deb
Then trigger the update again by:
sudo do-release-upgrade -d