Background Recently, I came across an article entitled: 5 Reasons Not to Use CentOS. While I actually disagree with all five points from a technical debate standpoint, I think this article is really the result of a few pain points that some developers express when talking about enterprise editions of Linux. Working as a technology
CentOS Post Mortem & Analysis
Background I manage the crunchtools lab and the infrastructure for this blog similar to a development data center. I have a rigorous weekly checklist, which includes optionally applying operating system patches as they are available. I do not perform the updates every week because of time constraints, but when I do, I patch all of
Red Hat Enterprise Virtualization (RHEV) & Identity, Policy, Audit (IPA)
Background In my ever evolving lab, it came time to integrate Red Hat Enterprise Linux (RHEV) with Identity, Policy, Audit (IPA).There were a few caveats and searching Google didn’t help, so hopefully this article can save you some time. Integrating the two was fairly straitforward. The biggest challenge was finding a quick and easy way
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El Caso De Red Hat: Un Negocio Exitoso Basado en Software Libre
Esta presentacion fue presentado en CampusLink 2.0. Fue la primera vez que yo he hablado profesionalmente en Español. Disfruté esta experiencia demasiado y espero tener la oportunidad hacerlo de nueva en años futuros.
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Campus Link 2.0
Background From the organizers: CampusLink 2.0 es un foro para el contacto directo entre estudiantes, maestros, profesionistas y expertos; inmersos en el mundo de las tecnologÃas de información. Translation: CampusLink 2.0 is a forum for direct contact between students, teachers, professionals, and experts; Immersion in the world of information technology. This is one of the
Ohio Linux Fest 2012
Background From the organizers: The tenth annual Ohio Linux Fest will be held on September 28-30, 2012 at the Greater Columbus Convention Center in downtown Columbus, Ohio. Hosting authoritative speakers and a large expo, the Ohio LinuxFest welcomes all Free and Open Source Software professionals, enthusiasts, and everyone interested in learning more about Free and
Devops with Bash
This presentation walks through some of the software development processes used to develop Shiva, a mass ssh client. The development of Shiva was used as a teaching aid for a class taught at Ohio Linux Fest 2012. Shiva was used to demonstrate concepts such as good command line interface design, testing, configuration design and advanced features of Bash, such as background functions. This presentation and associated class were developed to help systems adminsitrators think more like developers.
RHEL6 and Cisco WRVS4400N Networking
Background This weekend I decided to upgrade my home network with a Cisco WRVS4400N wireless router. Like a typical router it can provide standard wireless services WPA2, DHCP, etc, but the this model also provides support for four distinct VLANs and four distinct SSIDs. This has allowed me to create separate networks for work, play,
OpenSSL Certificate Authority
Background Recently, I discovered how to use the openssl provided CA script to create a certificate authority and self signed certificates. Traditionally, I had ran all fo the commands manually. When using the CA script it is critical to understand the underlying security concepts. Certificate Authority Openssl has infrstructure to create a long lived Certificate
KVM Virtual Network
Background My lab environment is supported by a KVM virtual network at each site. It includes four datacenters, more than a handful of physical machines and tens of KVM based virtual machines. Recently, I discovered that libvirtd does some interesting things with iptables FORWARD rules. When a NAT KVM virtual network is added, the following