SysAdmin

High-Availability Storage with HA-LVM

In recent years, there has been a trend in which data centers have been opting for commodity hardware and software over proprietary solutions. Why shouldn't they? It offers extremely low costs and the flexibility to build an ecosystem the way it is preferred. The only limitation is the extent of the administrator's imagination. more>>

DNSMasq, the Pint-Sized Super Dæmon!

I've always been a fan of putting aftermarket firmware on consumer-grade routers. Whether it's DD-WRT, Tomato, OpenWRT or whatever your favorite flavor of "better than stock" firmware might be, it just makes economic sense. Unfortunately, my routing needs have surpassed my trusty Linksys router. more>>

Wondershaper—QOS in a Pinch

In past articles, I've discussed my BirdCam setup and how it automatically archives video footage from my bird feeders to YouTube every night. That's a really cool process, but unfortunately, it saturates my upstream bandwidth in the evening. more>>

Ideal Backups with zbackup

Data is growing both in volume and importance. As time goes on, the amount of data that we need to store is growing, and the data itself is becoming more and more critical for organizations. It is becoming increasingly important to be able to back up and restore this information quickly and reliably. Using cloud-based systems spreads out the data over many servers and locations. more>>

Slow System? iotop Is Your Friend

Back in 2010, Kyle Rankin did an incredible series on Linux Troubleshooting. In Part 1, he talked about troubleshooting a system struggling with a high load. more>>

Handling the workloads of the Future

The history of computing can be traced by the popular buzzwords of the day. In fact, at some point we should run a contest where everyone submits their 5 all-time favorite computer industry buzzwords. There have been dumb terminals, smart terminals, client server, thin client, peer-to-peer, virtualization, containers, cloud, paas, saas, iaas…the list, and the acronyms stretch to the horizon. more>>

Readers' Choice Awards 2014

It's time for another Readers' Choice issue of Linux Journal! The format last year was well received, so we've followed suit making your voices heard loud again. I couldn't help but add some commentary in a few places, but for the most part, we just reported results. Please enjoy this year's Readers' Choice Awards! more>>

November 2014 Issue of Linux Journal: System Administration

Folger's Crystals

Every time I write a Bash script or schedule a cron job, I worry about the day I'll star in my very own IT version of a Folger's commercial. Instead of "secretly replacing coffee with Folger's Instant Crystals", however, I worry I'll be replaced by an automation framework and a few crafty FOR loops. more>>

Promise Theory—What Is It?

During the past 20 years, there has been a growing sense of inadequacy about the "command and control" model for managing IT systems. Years in front of the television with a remote control have left us hard pressed to think of any other way of making machines work for us. more>>

Integrating Trac, Jenkins and Cobbler—Customizing Linux Operating Systems for Organizational Needs

Organizations supporting Linux operating systems commonly have a need to build customized software to add or replace packages on production systems. This need comes from timing and policy differences between customers and the upstream distribution maintainers. more>>

Practical Tiny Core in the Fire Service

I'm sure many of you have at least heard of Tiny Core Linux—legends of how small it is, how little it takes it to run a system with it and even now how it's been ported to run on Raspberry Pi. It's an esoteric minimalist distribution. more>>

New Products

Please send information about releases of Linux-related products to newproducts@linuxjournal.com or New Products c/o Linux Journal, PO Box 980985, Houston, TX 77098. Submissions are edited for length and content.

Security Hardening with Ansible

Ansible is an open-source automation tool developed and released by Michael DeHaan and others in 2012. DeHaan calls it a "general-purpose automation pipeline" (see Resources for a link to the article "Ansible's Architecture: Beyond Configuration Management"). more>>

Adminer—Better Than Awesome!

I've always loved PHPMyAdmin for managing MySQL databases. It's Web-based, fairly robust and as powerful as I've ever needed. Basically, it's awesome. Today, however, I discovered something better than awesome: Adminer. Although it is conceptually identical to PHPMyAdmin, it is far simpler and far more powerful. How can it be both? more>>

How YARN Changed Hadoop Job Scheduling

Scheduling means different things depending on the audience. To many in the business world, scheduling is synonymous with workflow management. Workflow management is the coordinated execution of a collection of scripts or programs for a business workflow with monitoring, logging and execution guarantees built in to a WYSIWYG editor. more>>

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