Unleash your inner root

HTCondor Time Based constraints

HTCondor Time Constraints are something I’ve had more difficulty finding basic information on than anything else. Here is a simple example that will allow you to view held jobs that have been stuck for more then 24 hours. Time Constraint The following generates a time value of how long jobs have been in their current…

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Getting RequestTracker 4 to work with SELinux

Fighting with SELinux can be a tough thing in the IT world. Documentation for it is often fairly focused on a given problem, and generally explains THAT a given action fix’s something, rather then WHY a given action fix’s something. As such when you hit a wall with an application that there is no existing…

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Create an RPM for ANYTHING

In the modern era of Sysadmining it’s fairly common to have a configuration management tool such as Puppet, Chef, Ansible, or my personal favorite Saltstack. These tools make managing your systems a simple joy compared to maintaining all your configurations independently. One area that can often be a shortcoming of all of these tools is…

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Replacing Cron with SystemD.timers

Like most people, Every year I make some new years resolutions. Unlike most people, my resolutions all tend to revolve around IT. Every year I give myself a “It’s , stop doing “. One year I decided to stop using the “ifconfig” command, in favor of finally learning the proper use of the “ip” command…

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Xen to KVM: How to convert when xen is dead

Greetings internet wayfarer. If you have ended up here because your Xen server took a poop and you need to get those old para-virtualized Xen VM’s running on a KVM server. Well congrats, you have arrived. I just dealt with that very same problem. It’s a doozy, but fear not: There is a solution. It…

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chmod: Capital (X) Gunna Give it to you

Pardon the terrible title of this tutorial, but you know…I decided when I started this blog that I would have cheesy terrible titles, and this was the best one for the subject matter. Anyway, this is one of those “I feel dumb” moments that it’s entirely possible the entire Linux world knew about before I…

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Encrypting Apache: https and you!

OS : CentOs 7 / RHEL7 Derivitives Software : httpd (Apache) Version : 2.4.6 Introduction Encryption is a good thing. In a perfect world, you would never see an “http” without an “s” at the end. So in an effort to help make that happen, lets talk about encryption. First of all: There is a…

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multipath, lvm, and you!

Today I went on a magical learning adventure. I learned about multipathing(I had no idea it was a thing). It changed my world in a strange and radical way, left me feeling like the universe was a much bigger place. Insert other cliche statement here. Anyway, for those of you out there that are just…

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SSH Key with SSSD/LDAP

DISTRO: RHEL/CentOS VERSION: 6.7 Portability: Should work on any distribution using sssd rather than traditional ldap-client packages. So if you have recently joined the Cool Kids Club of the server admin world, you may now have an awesome LDAP server of your own to handle all your authentication needs. Now, you may be sitting there…

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Configuring openLDAP with Fusion-Directory

Greetings Meta-Wizards, this week we’re visiting a rough subject for me. OpenLDAP. Its frustrating, Its annoying, and its pretty much been my admin life for the last few months. This tutorial will walk you through a basic setup of openLDAP-server on CentOS/RHEL: 6.7 For those just looking for results, I provide A script on Github…

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