Wednesday Mar 21, 2012

Want to Patch your Red Hat Linux Kernel Without Rebooting?

Patched Tube by Morten Liebach
Patched Tube by Morten Liebach (CC BY 2.0)

Are you running Red Hat Enterprise Linux? Take back your weekend and say goodbye to lengthy maintenance windows for kernel updates! With Ksplice, you can install kernel updates while the system is running. Stay secure and compliant without the hassle.

To give you a taste of one of the many features that are included in Oracle Linux Premier Support, we now offer a free 30-day Ksplice trial for RHEL systems. Give it a try and bring your Linux kernel up to date without rebooting (not even once to install it)!

For more information on this exciting technology, read Wim's OTN article on using Oracle Ksplice to update Oracle Linux systems without rebooting.

Watch Waseem Daher (one of the Ksplice founders) telling you more about Ksplice zero downtime updates in this screencast "Zero Downtime OS Updates with Ksplice"

- Lenz

Tuesday Mar 13, 2012

Who the Linux Developer Met on His Way to St. Ives

For some reason I still remember this nursery riddle:

"As I was going to Saint Ives
I met a man with seven wives
Each wife had seven sacks
Each cat had seven cats
Each cat had seven kits
How many were going to St Ives?

The answer, of course, is one. More about the riddle here.

Little did I know, when I first learned it, that this rhyme would help me understand the Oracle Exadata Database Machine. Miss Blankenship, please forgive me:

As I was going to St Ives
I met a man with 8 Oracle Exadata Machines
Each machine had 8 sockets
Each socket had 8 cores
Each core had 2 threads
How many CPU's were going to St Ives?

If your i-phone has hobbled you to the point that you can no longer do simple arithmetic in your head, you can get the answer to that riddle by listening to these podcasts (the first one even provides notes):

Podcast: How Oracle Linux Was Optimized for the Oracle Exadata Database Machine

Turns out that when you use off-the-shelf components to build a NUMA system like the Exadata, you lower your hardware costs, but you increase the software work that must be done to optimize the system. Oracle Linux already had a set of optimizations well suited to this task. Chris Mason, director of Linux kernel engineering at Oracle, describes the process engineering used to optimize Exadata's integrated stack, touching everything from storage, to networking, the CPU, I/O speeds, and finally the application. Great Q&A, too.

Podcast: What's So Great About Oracle's Unbreakable Enterprise Kernel?

It's easy to replace your tired rust-bucket of a Linux kernel with the chromed-out Unbreakable Enterprise Kernel from Oracle, but why would you? Sergio Leunissen, Oracle Vice President, and Lenz Grimmer, blogger extraordinaire, explain why it's worth your time to use the Unbreakable Linux Kernel. Sergio and Lenz explain why Oracle went to the trouble to engineer its own kernel, what's included in Release 2, how it is tested, how it is optimized for the Oracle stack, the close relationship with the Linux community, and what benefits it brings developers and sysadmins.

Where to Get It, How to Use It

As you may have already heard, Release 2 of Oracle's Unbreakable Enterprise Kernel for Linux is now available. Here are some resources to help you get started.

- Rick with Todd Trichler





Friday Oct 08, 2010

Sysadmin Resources for Oracle Linux

Ducati missed a great opportunity to call the latest upgrade to my favorite sportbike the Ducati 848 Linux Edition. I think Larry needs to make a phone call....

To make up for Ducati's unpardonable slight to the entire Linux community, we've highlighted some Linux technical content on the front page of the OTN Systems Community, but front page headlines have a tendency to change quickly.

So here's a quick summary that you can slide into the map sleeve of your tank bag (or your Stich jacket if you prize function over form):

What's New

This page will let you know about Oracle announcements, new resources, community blogs or comments, and anything else related to Oracle Linux. Bookmark it someplace safe.


Get the new unbreakable kernel from Oracle's Public Yum Server or go to the Oracle Linux download center to select from a variety of Linux-related software.


  • Install Guides for Oracle Software on Oracle Linux
  • Oracle Linux 4 Release Notes
  • Oracle Linux 5 Release Notes
  • Red Hat Enterprise Linux Documentation
  • Also click on the Reference link in the left nav bar of the Linux-Solaris CommandComparo for general linux reference material for sysadmins
  • Forums, Blogs, and Other

    Training and Certification

    Oracle University offers Linux sysadmin certification based on Enterprise Linux that closely maps to Oracle's Linux training offerings. To become certified, you must demonstrate a high level of proficiency with Enterprise Linux including system administration, networking, and security.

    Oracle Unbreakable Linux Network

    The Unbreakable Linux Network is a community that provides Linux software patches, updates, and fixes, plus information on up2date program and support policies. Only for Linux users with Oracle support subscriptions.

    Linux-Solaris Command Comparo

    This wiki shows the equivalent command syntax for common administrative tasks in Oracle Solaris 10 and Oracle Enterprise Linux 5 – especially tasks that have tricky syntax or that you frequently need to double-check. Add, complete, and modify entries to make the wiki more useful and accurate. Anyone can read it, but to make changes, first register and then log in.

    Other Oracle Linux Resources

    Here's Oracle's announcement about the Oracle Unbreakable Linux Kernel, in case you missed it.

    More reviews about the Ducati 848 Linux Edition here:

    - Rick

    Logan Rosenstein
    and members of the OTN community


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