Upgrading Ubuntu 11.10 to 12.04 on an old OpenVZ kernel

upgradeUbuntu

# update
apt-get update
apt-get upgrade

# update manager for dist upgrades
apt-get install update-manager-core

# install recompiled libc, not available in repo

mkdir updateOpenVZ
cd updateOpenVZ
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6-dbg_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6-dev_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6-i386_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6-pic_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc6-prof_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc-bin_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/ovz-libc/+files/libc-dev-bin_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
dpkg -i *

# use precise repos or else you will get broken repositories (/etc/apt/sources.list)
deb http://archive.ubuntu.com/ubuntu precise main restricted universe
deb http://archive.ubuntu.com/ubuntu precise-updates main restricted universe
deb http://security.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu precise partner

# install missing packages required by the above debs
apt-get update
apt-get -f install

# Upgrade
do-release-upgrade

# Reboot and cross your fingers...

# Welcome to Ubuntu 12.04.2 LTS (GNU/Linux 2.6.32-042stab074.10 x86_64)
# Success!


# To install g++ and such, you will need a couple more files
wget https://launchpad.net/~izx/+archive/sandbox2/+build/3468429/+files/libc-dev-bin_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
wget https://launchpad.net/~izx/+archive/sandbox2/+build/3468429/+files/libc6-dev_2.15-0ubuntu10%2Bopenvz0~oneiric_amd64.deb
dpkg -i *