inside the mind of a linux admin

unhackable.org offers legacy KSplice protection

Unhackable Security is a Linux security consulting firm specializing in a wide array of technologies and proven practices which make your server virtually unhackable. Ksplice is an extension of the Linux kernel which allows system administrators to apply security patches to a running kernel without having to reboot the operating system. Ksplice takes as input […]

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Firefox 9 Released – How to install on Ubuntu

Firefox 9 is now available — but unlike its previous rapid release forebears where not a lot changed, a huge feature has landed with the new version: the JavaScript engine now has type inference enabled. This simple switch has resulted in a 20-30% JS execution speed increase (PDF), putting JaegerMonkey back in line with Chrome’s […]

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Writing Python code to use MySQL

Python is a programming language that lets you work more quickly and integrate your systems more effectively. I’ve been programming primarily in Python lately, and had the need to open a socket to a MySQL database to pull data. By default, older versions of Python does not currently have a mySQL library that can easily […]

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Find the fastest DNS resolver near you

I recently stumbled upon an awesome tool called Namebench. Namebench it’s a small program wrote in python that search for the fastest DNS server near to you. Namebench runs benchmarks using your web browser history, tcpdump output, or standardized datasets in order to provide an individualized recommendation. Namebench is completely free and does not modify […]

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creating a patch file from git

I’m a huge fan of the oldschool “patch” command, and sometimes in the wild I use Gitorious’ “raw diff” view which puts the changes in easy to read patch format. However, you can also do this on the command line to create a patch file that can be applied using “patch -p0 < patchfile". git […]

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Howto: Install Firefox 6 on Ubuntu via PPA

I just upgraded to Firefox 6 on Ubuntu. The new version doesn’t have any major interface changes but is 20% faster than Firefox 5. Startup time has also been improved especially for those like me with a lot of tabs and groups. Firefox 6 uses about 8% less resources than the older version so it […]

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How to migrate a Virtuozzo VPS to OpenVZ

To migrate from Virtuozzo VPS to OpenVZ you must “rsync” root area to private area to avoid incompatibility of OpenVZ and Virtuozzo Cache Templates. 1. Create your VPS with id 3 using your desired template (for example) # vzctl create 3 –ostemplate ubuntu-11.04-x86_64 –conf unlimited Creating container private area (ubuntu-11.04-x86_64) Performing postcreate actions Saved parameters […]

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Full Graphite and statds installation on CentOS

Graphite is a highly scalable real-time graphing system. We use it to graph all sorts of metrics. Basically, you write an application that collects numeric time-series data that you are interested in graphing, and send it to Graphite’s processing backend, carbon, which stores the data in Graphite’s specialized database. The data can then be visualized […]

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How to “Git” your own repository

Git is a distributed revision control system with an emphasis on speed. Git was initially designed and developed by Linus Torvalds for Linux kernel development. This guide will walk you through the basics of getting up and running with git. First, you’ll need to install the client. If you’re using Ubuntu, you’ll want apt-get. Obviously […]

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Advanced Bash Scripting: variable within a variable

Many folks will know this in many other programming languages (C, C++, etc) as a “pointer”, but what if you’re a bash kid at heart and you want to define a variable within a variable? I encountered this exact quandary today while coding a pretty sophisticated script which reaches back into the past for data. […]

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