Ubuntu: How to remove all i386 packages from Ubuntu 64bit?


Over the time I installed many i386 packages, which I no longer need. How can I clean up the system and stay only with the amd64 packages?


If they are not in your way, I would leave them where they are.
If you insist on deletion, use dpkg -l | grep i386 to create a list of i386-packages. You can delete these after careful checking with something like sudo apt-get purge <package-name>.


I blitzed all my 32bit packages like this:

sudo apt-get remove `dpkg --get-selections | grep i386 | awk '{print $1}'`  


The upper automated solutions are dangerous and not always working (1), so here another way

sudo aptitude purge `dpkg --get-selections | grep ":i386" | awk '{print $1}'`  


sudo apt-get purge `dpkg --get-selections | grep ":i386" | awk '{print $1}'`  

(Try to use always and only one of the tools. Since aptitude is better when having dependency trouble, I prefer that.)

Good idea to also

dpkg --remove-architecture i386  

and maybe

dpkg --print-foreign-architectures  

(1) The former commands also lists packages having only i386 in their name (although they are for 64bit architecture), the regular expression didn't work and dpkg shows packages which are already removed, but still have configuration files left (dpkg -l shows "rc" instead of "ii" as status).


In case anyone is wondering, there's a much more sane and graceful way to do this. The last previous answer hopes to do the same thing, but that search fails since architectures are not actually part of package names, except in special cases.

as root (or with sudo) run:

aptitude remove ~i~ri386  

If you don't use aptitude over apt-get already, do. It's really excellent. You can find a list of aptitude's search terms here.


Here is another way that is even lower risk:

apt-get remove "^.*:i386$"

This will specifically match only packages ending with ":i386", which is the standard naming convention for all i386 architecture Debian packages.


The debian's multiarch guide mentions this command: apt-get purge ".*:<arch>", which would looks like this for i386:

apt-get purge ".*:i386"  

You can then remove the architecture from dpkg:

dpkg --remove-architecture i386  

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