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Oracle XE 10gR2 on Kubuntu 64-bit

So I started poking around for instructions on installing Oracle XE 10gR2 on my Kubuntu Hardy 64-bit installation recently. I came across this article from Oracle, which seemed like exactly what I wanted. Unfortunately, it assumes that the intended host operating system is 32-bit, which causes issues if you try to install XE through apt as the Oracle article suggests. After following these instructions, I immediately received this error:

W: Failed to fetch http://oss.oracle.com/debian/dists/unstable/Release \
    Unable to find expected entry  main/binary-amd64/Packages in \
    Meta-index file (malformed Release file?)

After that, any apt command issued (related or not) produced this error.

E: The package oracle-xe needs to be reinstalled, but I can't find an \
    archive for it.

And finally, when I resorted to using this excellent guide instead, I ran into this problem because of the earlier failed installation.

dpkg: regarding oracle-xe-universal_10.2.0.1-1.1_i386.deb containing \
    oracle-xe-universal:
 oracle-xe-universal conflicts with oracle-xe
  oracle-xe (version 10.2.0.1-1.0) is present and broken due to failed \
    removal or installation.
dpkg: error processing oracle-xe-universal_10.2.0.1-1.1_i386.deb \
    (--install):
 conflicting packages - not installing oracle-xe-universal
Errors were encountered while processing:
 oracle-xe-universal_10.2.0.1-1.1_i386.deb

Luckily, I was able to find a solution to purge the failed installation from the system. One thing that the Oracle article was useful for was creating a swap file large enough for Oracle to use, as the issue described in the article with not having enough swap space did arise when I initially tried the installation. Beyond that, the non-Oracle guide mentioned earlier worked like a charm and I now have a working XE installation on my system.