Upgrade to CentOS 5.11 from CentOS 5.10 (5.9, 5.8, 5.7, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0)

This is quick guide, howto upgrade to CentOS 5.11 from CentOS 5.10 (5.9, 5.8, 5.7, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0).

1. Change to root User

2. Backup all important data

  • Backup /etc diretory
  • Backup important logs /var/log
  • Backup web server configs and sites
  • Dump MySQL databases
  • Dump PostgreSQL databases
  • Backup all what you need if something goes wrong

3. Check list of packages that are going to be updated

4. Upgrade with yum update

Official way to do upgrade:

Another way to do update is first clean all, second update glibc, yum, rpm and python packages and then update other packages like following:

5. Reboot

6. Check CentOS 5.11 release info and Check your entire system

Following needs redhat-lsb package

Check that your system is working normally and test every services.

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  1. Thanks for the instructions. I just upgraded a fresh CentOS 5.3 install up to CentOS 5.5 final. I followed your instructions exactly and they worked perfectly.

    I had been using Fedora before (way back on Fedora 7). I tried to upgrade through a few Fedora versions, but I decided it was time for the nightmare to end. It’s almost a shock that the same company that makes Fedora is really behind CentOS (Fedora = Beta, Redhat=Paid, CentOS=Free Redhat Clone w/out Support).

    Anyway, thanks for the post. It worked like a charm.

  2. I really liked your blog! It helped me alot…

  3. Thanks for the help, it worked perfectly

  4. Thanks for the instructions, they helped a lot , i’ll keep a bookmark to your blog incase anything changes for version 6. now i’ve just got to upgrade the php

  5. Hi, I get this error;

    [root@vel ~]# lsb_release -a
    -bash: lsb_release: command not found

    What should I do to this?

    • Hi sadvel,

      Simply install redhat-lsb

  6. Hi,

    Just done an upgrade from 5.3 to 5.4 using the above process (thanks! )

    It won’t upgrade any further than 5.4. How do I get it to go to 5.5 or above? I’ve tried yum clean all, and repeating the above process, but it just says nothing to upgrade.



  7. Very good information.
    Thks a lot.

  8. Thank you sir!

  9. Very useful information, thank you.

  10. useful information. Thank you.

  11. Standard newbie excuse here. Does “yum update” update applications such as apache, php and mysql such that I might end up with compatability issues with my php webpages?

    Additional question: when “yum list updates” for examples shows “php.i386 5.1.6-40.el5_9 updates” is that where I am now, our where I will be if the update suceeds?

    • Hi Alf,

      Yes it’s of course possible, that updating applications like apache, php, mysql breaks your php code (this totally depends on your code). So it’s important to know are you updating php from 5.1 to 5.5 or are you updating just minor versions, like from 5.1.6 to 5.1.7 or even just some new build, like 5.1.6-37 to 5.1.6-40.

      Yum list updates shows new version, but if you use following command:

      Then you should see installed and available versions, so yum update your package from installed version to available version.

      You can of course “pin” package versions (using /etc/yum.conf) or exclude some packages from upgrade process, if you want, but normally RHEL/CentOS 5 updates are important security updates.

      If you need more help, feel free to ask.

  12. Thank you for that clear explanation. My experience with computers has been that the chances of a failed upgrade is exponentially proportional to the number of modules times the number of revisions to go.
    So does your experience indicate “yum update” from 5.2 to 5.9 has a good chance of success?

    Thanks again.

    • Hi Alf,

      Sorry for the late reply, but I think you have a good change of success, when you upgrade from 5.2 to 5.9. You should of course backup your important stuff first.

  13. Good one, It worked without issues I have upgraded CENTOS 5.6 to CENTOS 5.10

  14. Hello,

    fantastic instructions! I just have a small problem in my environment, I upgrade from Centos 5.5 to 5.11 using your instructions then perform the reboot, upon startup the server can’t load eth0 and I can’t activate it. To fix I’ve had to remove the NIC settings then restart and add them in again. Is there a BUG that would be causing this? I’ve tested this twice so far on the my test lab.




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