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Category Archives: Linux

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GParted Tutorial: Expanding root partition when LVM is not available

GParted Tutorial: Expanding root partition when LVM is not available

A tutorial on using GPartedaka Gnome Partition Editor. Here I will use a VM (SLES 10 Sp4, no LVM) to expand the root “/” partition, currently installed on /dev/sda2

Posted on June 4, 2015 by Ben · Leave a comment

Getting MD5 and SHA-1 Hash Values On Linux, AIX, and Windows

Getting MD5 and SHA-1 Hash Values On Linux, AIX, and Windows

Hashing is one of the most useful practices a sysadmin can employ. I think too many sysadmins do not use this as a regular part of their everyday work. Even a home user on a windows box can utilize hashing to save yourself a lot of headache! Quick tutorial how … Continue reading →

Posted on May 2, 2014 by Ben · Leave a comment

How To Encrypt A Filesystem On Redhat 6.4/Centos 6.4 Linux (FIPS or NO FIPS)

How To Encrypt A Filesystem On Redhat 6.4/Centos 6.4 Linux (FIPS or NO FIPS)

Quick tutorial on how to encrypt a filesystem (at the device level) on Redhat 6.4 a.k.a. CentOS 6.4 a.k.a. Oracle Linux 6.4. This is a three step process: 1) enable FIPS (if desired), 2) encrypt filesystem, and 3) automated mount if desired. I put this guide together because at first … Continue reading →

Posted on April 21, 2014 by Ben · 6 Comments

Quickie tutorial: ulimit, soft limits, hard limits, soft stack, hard stack

Quickie tutorial: ulimit, soft limits, hard limits, soft stack, hard stack

A quick thing I ran into today using ulimit. Quick, helpful, short. So short maybe it didn’t necessitate such a long blog title.

Posted on April 12, 2014 by Ben · 3 Comments

Building A Two Node SLES11 SP2 Linux Cluster On VMware

Building A Two Node SLES11 SP2 Linux Cluster On VMware

So… interested in building a linux cluster huh? If so you definitely have a few choices in OS. The big names (and what I would call the most reliable names) are Redhat Linux (a.k.a. CentOS a.k.a. Oracle) and Suse Linux Enterprise Server (a.k.a. SLES). Read on!

Posted on February 20, 2014 by Ben · 8 Comments

Reducing Filesystem FS Size and LVM Size in Linux

Reducing Filesystem FS Size and LVM Size in Linux

Quick tutorial of something I did today: reducing filesystem size and LVM size in Linux. My example is based on a Redhat 6.4 box (and thus should work on Centos 6.4). While not verified on other Linuxes, most LVM steps and resize FS steps are the same across linuxes. Enjoy!

Posted on February 19, 2014 by Ben · 3 Comments

My New Year’s Resolutions: 2014 a.k.a. The Year Of Adventure!

My New Year’s Resolutions: 2014 a.k.a. The Year Of Adventure!

Sure sure, it’s already February, and the year is already about 10% of the year over already, but that doesn’t mean I can’t still squeeze these in. Some is better than none! If you know me, you know I love themes. For 2013, I had the idea of “Rebirth” as … Continue reading →

Posted on February 13, 2014 by Ben · Leave a comment

My New Year’s Resolutions: Grading 2013

My New Year’s Resolutions: Grading 2013

Sure sure, it’s already February, and the year is already about 10% of the year over already, but that doesn’t mean I can’t still squeeze these in. Some is better than none! And as a birthday present to myself (February 13), I finally finished these New Year Resolution blog posts … Continue reading →

Posted on February 13, 2014 by Ben · Leave a comment

The Magic Of Hash (And I Mean Of The MD5 and SHA-1 Vintage)

The Magic Of Hash (And I Mean Of The MD5 and SHA-1 Vintage)

Hashing is one of the most useful practices a sysadmin can employ. I think too many sysadmins do not use this as a regular part of their everyday work. While there are security concerns that go with hashing for verification purposes, once you understand what it does you’ll find there … Continue reading →

Posted on October 31, 2013 by Ben · Leave a comment

Windows Can’t Boot? Need To Recover Files? Clonezilla To The Rescue!

Windows Can’t Boot? Need To Recover Files?  Clonezilla To The Rescue!

Clonezilla is a free imaging tool. That already rocks in itself. However, Clonezilla is based on a mini linux kernel (Debian based) which features shell access among many other things. (Clonezilla official site) Plus, as an imaging tool, a variety of raid card drivers and hard drive drivers are included. … Continue reading →

Posted on August 20, 2013 by Ben · Leave a comment
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