Tested on Ubuntu 16.04. Here are the commands, life story and explanation is below:
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echo foreign-architecture amd64 | tee \/etc\/dpkg\/dpkgcfgd\/multiarch\n\ndpkg --add-architecture amd64\n\napt update\napt install linux-image-4.15.0-50:amd64\napt install gcc-multilib\napt upgrade<\/pre>\n\n\n\n
(Reboot, make sure you boot on to the new kernel), and then setsources.list<\/code> to only have amd64 (Put[ arch=amd64 ]<\/code> before each URL)<\/p>\n\n\n\napt update\ndpkg --get-selections | grep -v deinstall | cut -f1 > list.log\n\nfor i in $(cat list.log); do apt install --reinstall \"$i\"; done<\/pre>\n\n\n\n
Not all packages will reinstall, just ones with 64 bit versions. Remove amd64 requirement fromsources.list<\/code>.<\/p>\n\n\n\nExplanation<\/h2>\n\n\n\n
I hope this isn’t a common problem. As is stated somewhere on this website (I think), we’re all students at the same college. For one of our classes we were given an environment to complete some assignments in, and let’s just say it’s a bit old. Initially it had 32 bit Ubuntu 12 and Windows Sever 2012 (not r2).
After version hopping to Ubuntu 16, we decided to try and make it 64 bit so that we could install a personal project of mine called Gogios. Surprisingly, it worked decently well. It is not a perfect switch though. The resulting system will be a multiarch one, not pure 64 bit.
Now for the explanation.
<\/p>\n\n\n\necho foreign-architecture amd64 | tee \/etc\/dpkg\/dpkgcfgd\/multiarch\ndpkg --add-architecture amd64<\/pre>\n\n\n\n
These lines informdpkg<\/code> that 64 bit packages should also be installable. This is what allows the system to become multiarch and have a 64 bit kernel.
<\/p>\n\n\n\napt update\napt install linux-image-4.15.0-50:amd64\napt install gcc-multilib\napt upgrade<\/pre>\n\n\n\n
Standardapt<\/code> stuff mostly. First update the package list to include 64 bit packages. Then install a 64 bit kernel. As of writing this 4.15 is the latest available. I’ve tried this withgeneric<\/code> andlowlatency<\/code> and both worked fine, so pick either. The second install is forgcc-multilib<\/code>, as the currently one is probably only for 32 bit. Finally, upgrade all current packages.
At this point, reboot and make sure that you boot onto the x86_64 kernel that was just installed. After you’re back up, add[arch=amd64]<\/code> before each URL in sources.list.
<\/p>\n\n\n\napt update\ndpkg --get-selections | grep -v deinstall | cut -f1 > list.log\n\nfor i in $(cat list.log); do apt install --reinstall \"$i\"; done<\/pre>\n\n\n\n