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Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
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We had a PERC H800 MegaRaid adapter in one of our Dell PowerEdge R910 systems. We had a Dell MD1220 array attached to that.
We bought a new SuperMicro based system and initially put the PERC H800 in this server in the top slot of the middle riser. It was dead as a door nail there. Original documentation for the PERC H800 indicated it only worked in certain Dell PowerEdge models so I didn't know if it should work in this new system.
I've had to migrate multiple Oracle instances from RHEL 5.9 to RHEL 6.8 because we're replacing an old server. This is Oracle 11gR2 using ext4 filesystems (not RAC/GRID, not using ASM).
Just wanted to share the steps. Presumably this would work for most (Redhat derived at least including CentOS and Fedora) Linux flavors so I only specify the source and target distro/versions for completeness.
We use a Hitachi VSP disk array and with full fiber...
Posted 03-19-2016 at 10:59 AM byMensaWater Updated 09-06-2016 at 04:00 PM byMensaWater(Adding note about ciphers)
We found the version of curl provided for RHEL5 does not include the flags "--tlsv1.1" or "--tlsv1.2" provided by later versions of curl.
This means CentOS5 curl does not include/support the flags "--tlsv1.1" or "--tlsv1.2".
RHEL7 and RHEL6 versions do support TLSv1.1 and TLSv1.2 and work when using them. One might need to run yum update for curl and/or openssl to have the versions with the support. On my RHEL6 systems I had...
I'm writing this up because I've often seen the question "How do I extract email attachments at command line?". I had to figure out how to use various tools to do this recently and figured I'd share what I did.
While what is written below certainly works for extracting email attachments including those sent by OSN it turns out Oracle does NOT include all fields in the email they send so we ultimately abandoned this setup for OSN and are instead...