This post follows the fact that I noticed that some of my 64bit development machines had 32bit binaries installed on them. It should be noted that this is not fatal in any sense of the word, but it is simply not ideal.

Here I will present how you can first identify what your machine’s architecture is, and then I will show how you can b
oth remove existing 32bit binaries, and how you can configure YUM so that it will only ev
er install 64bit software.

This blog post is only relevant if your linux box uses YUM as a package manager.

Identifying your machine’s architecture

In order to find out what your machine’s architecture is you need to execute the following command from your command line:

uname -a

If the result looks something like below, it means you have a 64bit machine, where the x86_64 implies the machine is 64bit.
If it had any of i386, i586, or i686, it would imply that the machine was a 32bit one.

Linux foo.bar.com 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux

Remove all 32bit binaries :

yum erase *.i386
yum erase *.i586
yum erase *.i686

Tell YUM to never install 32bit binaries again:

You need to add the below line to your yum.conf file (usually found in /etc/) :

exclude=*.i386 *.i586 *.i686

At this point, all future software install via the YUM package manager will be optimised for your machine’s architecture.

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