• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=907132# DaSh

• https://www.quora.com/How-can-I-upgrade-my-Ubuntu-32-bit-to-64-bit-without-a-fresh-install# UpGrade
• https://github.com/pbkwee/distrorejuve
• http://nanonanonano.net/linux/debian/crossgrading# 64
• https://wiki.debian.org/CrossGrading
• https://blog.rimuhosting.com/2018/03/21/32-to-64-bit-distro-crossgrades/
• https://askubuntu.com/questions/5018/is-it-possible-to-upgrade-from-a-32bit-to-a-64bit-installation
• https://lwn.net/Articles/483592/

sudo apt-get install linux-image-amd64:amd64
 export LANG=C
dpkg --print-foreign-architectures
amd64

apt-cache search linux-image | grep 64
sudo apt-get install linux-image-unsigned-4.15.0-32-lowlatency 

FROM=armel
FROM=armhf
FROM=i386 # Older
apt remove  $(dpkg -l | grep '^.i.*:'"$FROM" | awk '{print $2}' )
dpkg --remove-architecture "$FROM" ; dpkg --print-foreign-architectures

• https://wiki.debian.org/CrossGrading

sudo dpkg --add-architecture amd64
apt-get install busybox-static dctrl-tools aptitude
apt-cache search linux-image | grep 64 | grep linux-image-unsigned- | grep generic | sort -nr | head -n1
sudo apt-get install linux-image-unsigned-5.0.0-25-generic