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Upgrade fucking Ubuntu from 14.04 to 16.04

Yes upgrade from 14.04 to 16.04 isnt problem sometimes …

My way

sudo apt-get update && upgrade ...

sudo apt-get dist-upgrade

sudo do-release-upgrade

Checking for a new Ubuntu release …

Downloaded milion packages for new version ubuntu… maybe 1200 and more ..

next process was “dpkg: error processsing package … (–configure)” wtf ?

Problem was in mixed package between 14.04 version and 16.04 version!

Ok reboot to recovery ubuntu and repair packages with apt-get and “relocation error … ” wtf…

apt-get: relocation error: /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0: symbol _ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7compareERKS4_, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference

solutions: 
sudo dpkg -i libstdc++6_5.3.1-14ubuntu2.1_amd64.deb