Migrate Jessie-x86 to x86_64

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# Add the x86_64 kernel
sudo apt-get install linux-image-amd64
# Add the architecture to dpkg
sudo sudo dpkg --add-architecture amd64
# Reboot on the x86_64 kernel
reboot
# Checkpoint the currently installed packets
dpkg --get-selections "*:i386"|grep -v deinstall >dpkg-get-selections.cp.00.i386
dpkg --get-selections "*:amd64"|grep -v deinstall >dpkg-get-selections.cp.00.amd64
dpkg --get-selections "*:all"|grep -v deinstall >dpkg-get-selections.cp.00.all
# Install debootstrap
sudo apt-get install debootstrap
# Prepare the x86 debootstrap tree
mkdir -p bootstrap-i386
debootstrap --arch=i386 --download-only --include=openssh-client,openssh-server jessie bootstrap-i386/
# Prepare the x86_64 debootstrap tree
mkdir -p bootstrap-amd64
debootstrap --arch=amd64 --download-only --include=openssh-client,openssh-server jessie bootstrap-amd64/
# Agregate and mark for install all the base packages from the x86_64 debootstrap tree
ls -1 bootstrap-amd64/var/cache/apt/archives/|egrep "\.deb$"|cut -d "_" -f1|awk '{print $1 " install"}' >dpkg-get-selections.base

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sudo aptitude search '?narrow(?not(?archive("^[^n][^o].*$")),?version(CURRENT))?architecture(i386)'
sudo apt-get install linux-image-amd64 dctrl-tools
sudo dpkg --add-architecture amd64
sudo apt-get update
reboot
cd /var/cache/apt/archives
sudo apt-get clean
sudo aptitude search --disable-columns -F%p '~ri386~i!~o' | xargs -n1 sudo apt-get -o APT::Architecture=amd64 download # This will take a while.
grep-status --field=Status "install ok installed" | grep-dctrl --field=Multi-Arch same --show-field=Package --no-field-names | sed 's/$/:amd64/' | xargs -n1 sudo apt-get -y install # This will take even longer and fail.

# This is a custom script to remove i386 packages that are already installed as amd64.
# You should run it multiple times because packages are processed alphabetically and will meet dependency problems.
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#!/bin/bash

i=1

echo "Get AMD64 packages"
sudo aptitude search '~ramd64~i' | awk '{print $2}' > packages.amd64
echo "Get i386 packages"
sudo aptitude search '~ri386~i' | awk '{print $2}'  | sed -e 's/:i386//' > packages.i386
echo "Compute common lines"
comm -1 -2 --nocheck-order packages.i386 packages.amd64 > packages.comm
tot=`cat packages.comm | wc -l`
echo "${tot} common packages to remove."

for deb in `cat packages.comm`; do
    echo "######################################"
    echo "Remove ${deb}:i386 (${i}/${tot})"
    echo "######################################"
    sudo dpkg -r ${deb}:i386
    i=$((i+1))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# Fuck'd up package beyond recuperation
sudo mv /var/lib/dpkg/info/python-pil:i386.* /tmp/
sudo apt-get -f install

# Look for broken packages
aptitude search ~b
# Remove the i386 kernel
sudo aptitude remove '~ri386~nlinux-~i'
# This command shows the installed i386 packages. Make sure they all have an amd64 counterparty.
sudo aptitude search '~ri386~i'




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phonon-backend-vlc (recommended), phonon4qt5-backend-gstreamer, phonon-backend-gstreamer



# Reference
# http://www.ewan.cc/?q=node/90 # NOPE
# http://anarc.at/services/upgrades/cross-architecture/
# http://www.nanonanonano.net/linux/debian/crossgrading