I've done that a couple of times over the years, on Debian systems. Largely as a result of moving from UML->KVM. This is roughly the guide I followed, which h

I've done that a couple of times over the years, on Debian systems. Largely as a result of moving from UML->KVM. This is roughly the guide I followed, which has existed for a good few years. https://wiki.debian.org/Migrate32To64Bit https://wiki.debian.org/Migrate32To64Bit