Installing GNU/Linux on the IBM RS/6000 43P model 7248 HOWTO
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# Appendix: Updating from YellowDog 2.3 (Dayton) to 3.0 (Sirius)

Here's how to update Yellow Dog Linux from 2.3 (Dayton) to 3.0 (Sirius). This assumes being done just after finishing the base install (ie: very few packages installed)

If we are running X (the following is based on the "base" install, so we probably aren't), switch to text mode (/sbin/init 3). We assume we have some network access, the fatter the better. We are going to download some packages manually, so check that you're able to do that. Some console-based download tool like ncftp (ftp) or lynx (http) might come handy.

Note for the following: If you get errors from rpm that are not noted here, you can always do an

    rm -f /var/lib/rpm/__* ; rpm --rebuilddb

This repairs the rpm database in most cases.

First, ensure that we are running latest versions of all software. This may not be necessary, but whatever.

    apt-get update; apt-get dist-upgrade

Now we change /etc/apt/sources.list to include repositories for 3.0 Note that there are only three repositories for 3.0: base, main, update. Fire up your favourite editor (at least vi should be installed) and update the file. A working sources.list may look like like this:

    rpm ftp://ftp.uninett.no/linux/yellowdog/apt 3.0 base main update
    rpm-src ftp://ftp.uninett.no/linux/yellowdog/apt 3.0 base main update

Now let's update the package list and check how far-fetched a complete dist-upgrade is:

    apt-get update
    apt-get -s dist-upgrade

Woha! Lots of errors there. Let's resolve the worst of them. Start with removing lots of packages. Note that after this, we can't read man pages.

    rpm -e kudzu kernel-pcmcia-cs rpm-python yup yi pspell aspell groff man

What's status now?

    apt-get -s dist-upgrade again

Still errors, and quite unresolvable. We have to take some more low-level action. The really pain is to get a new version of rpm installed, so let's start with that. Manually download the following packages:

      glibc-2.3.1-51a.ppc.rpm
      glibc-common-2.3.1-51a.ppc.rpm
      libelf-0.8.2-2.ppc.rpm
      popt-1.7-9d.ppc.rpm
      rpm-4.1-9d.ppc.rpm
      librpm404-4.0.4-8x.27.ppc.rpm
      apt-0.5.5cnc4.1-1b.ppc.rpm
      libgcc-3.2.2-2a.ppc.rpm
      libstdc++-3.2.2-2a.ppc.rpm
      expat-1.95.4-1.ppc.rpm
      fontconfig-2.1-3.ppc.rpm
      freetype-2.1.3-4.ppc.rpm
      XFree86-libs-4.3.0-2.1c.ppc.rpm
      XFree86-libs-data-4.3.0-2.1c.ppc.rpm
      XFree86-Mesa-libGL-4.3.0-2.1c.ppc.rpm

We don't have use for apt for a while, so let's just remove it:

    rpm -e apt

So far, so good. Now, let's upgrade glibc and rpm. This is the most critical part. If we succeed in this, the rest is simple. If we get this wrong, a reinstall may be the only solution. rpm has some dependencies, so we have to include them now.

    rpm -Uvh glibc-common-2.3.1-51a.ppc.rpm \
             glibc-2.3.1-51a.ppc.rpm        \
             libelf-0.8.2-2.ppc.rpm         \
             popt-1.7-9d.ppc.rpm            \
             rpm-4.1-9d.ppc.rpm             \
             librpm404-4.0.4-8x.27.ppc.rpm

If your setup is like mine, we're stuck with the following unresolvable error:

    rpmlib(PartialHardlinkSets) <= 4.0.4-1 is needed by glibc-common-2.3.1-51a

This seems to be a problem overseen by the packagers of YellowDog (and to be honest, I think they inherited this error from RedHat), so we just ignore it, use some force, and hope this won't bite us later.

    rpm -Uvh --nodeps --force glibc-2.3.1-51a.ppc.rpm                \
                              glibc-common-2.3.1-51a.ppc.rpm         \
                              libelf-0.8.2-2.ppc.rpm                 \
                              popt-1.7-9d.ppc.rpm                    \
                              rpm-4.1-9d.ppc.rpm                     \
                              librpm404-4.0.4-8x.27.ppc.rpm

Uh-oh. Ugly errors from rpm. Let's check if the rpm database still works.

    rpm -qa

Well, looks like we've really done it. Now what? Sorry to say, but I've tricked you into ruining your computer installation. Get out and get a life instead of looking on these old dust-collectors. Just kidding. Luckily, rpm is able to rebuild it's databases, so we just remove the old one and build a new.

    rm -f /var/lib/rpm/__*
    rpm --rebuilddb

Now the database should work again, right?

    rpm -qa

If this works, we collect 250 bonus points and two silver stars, and can continue our quest for 3.0. Find the dagger and throw it at the dragon.

If we don't have any special parameters for nsswitch and gconv-modules, we'll use the new ones (if existing):

    mv -f /etc/nsswitch.conf.rpmnew /etc/nsswitch.conf
    mv -f /usr/lib/gconv/gconv-modules.rpmnew /usr/lib/gconv/gconv-modules

Now let's reinstall apt. Is also have a lot of dependencies that have to be fixed:

    rpm -Uvh apt-0.5.5cnc4.1-1b.ppc.rpm            \
             expat-1.95.4-1.ppc.rpm                \
             freetype-2.1.3-4.ppc.rpm              \
             fontconfig-2.1-3.ppc.rpm              \
             libgcc-3.2.2-2a.ppc.rpm               \
             libstdc++-3.2.2-2a.ppc.rpm            \
             XFree86-libs-4.3.0-2.1c.ppc.rpm       \
             XFree86-libs-data-4.3.0-2.1c.ppc.rpm  \
             XFree86-Mesa-libGL-4.3.0-2.1c.ppc.rpm \

I've sometimes got rpm to hang at this place. It's a known bug in rpm and can hit you anytime. If you experience this, get another terminal (Alt+F2 if you're on the main console) , kill rpm, and remove and rebuild the database. Then do the wanted rpm command again.

    killall -9 rpm
    rm -f /var/lib/rpm/__*
    rpm --rebuilddb

Now; the installation of apt may have changed our sources.list, so check it out, and copy back the original if you want to.

    mv /etc/apt/sources.list /etc/apt/sources.list.3.0.orig
    mv -f /etc/apt/sources.list.rpmsave /etc/apt/sources.list

We should now probably resync the local apt database and check the status

    apt-get update && apt-get -s dist-upgrade

Still some unresolved dependencies, but we're getting there. With apt installed, the rest is like chewing boiled fish. Nothing to care about. Ouch! a bone.

    apt-get install pam

Drags in the following packages: chkconfig cyrus-sasl cyrus-sasl-gssapi cyrus-sasl-md5 cyrus-sasl-plain db4 hesiod openldap openssh openssh-clients openssh-server openssl perl perl-Filter python sendmail

Unless you have done some special pam configuration, use the new values for system authetication. Then go on updating.

    mv -f /etc/pam.d/system-auth.rpmnew /etc/pam.d/system-auth

    apt-get install passwd

Drags in the following packages: glib2 libuser

    apt-get install kbd

Drags in the following packages: initscripts util-linux

    apt-get install compat-db compat-pwdb

Drags in the following packages: compat-libstdc++

    apt-get -s dist-upgrade

If no errors, we're with all the difficult parts. Good! Now the final hurdle: A full dist-upgrade. Do an

    apt-get -y dist-upgrade

and enjoy getting to the end of this quest. You get all the points. Just kiss the frog and you'll get the princess too. You may want to reboot, just to check that everything comes up like you wish.

You may want to reinstall some packages again. For example "man" may become handy.

    apt-get install kudzu rpm-python pspell aspell groff man

That's all there is to it. It wasn't that difficult, was it?

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