I.T. Security and Linux Administration:

April, 2013

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April 30, 2013  10:23 PM

Web App/Vulnerability Scanner

Eric Hansen Eric Hansen Profile: Eric Hansen

I want to know something: what scanner(s) do you use to assess the security of your systems, programs, network, etc...? For example, Metasploit and Nessus are two of the most popular in this field, but there's also ones such as OpenVAS, W3af, Nikito. Of the one(s) you use, why do you? What...

April 30, 2013  7:38 PM

Usability Systems

Eric Hansen Eric Hansen Profile: Eric Hansen

While I've kind of put a hold on the monitoring solution (kind of shifted gears, so twiddling between that and another project), one thing is true regardless: usability needs to exist at the highest level. Bluntly, when writing UI, you have to write it with the mindset of people not knowing how...


April 24, 2013  1:54 PM

Quick Shell Trick – Find Memory Usage

Eric Hansen Eric Hansen Profile: Eric Hansen

Unlike Windows (hear me out), its not as easy to find out how much memory a process is using.  Tools like ps report the RSS (resident set size), which "significantly overestimate memory usage" while PSS (proportional set size) measures "each application's 'fair share' of each shared area to give a...


April 21, 2013  10:33 PM

Writing a Full-Serviced Sysadmin App from Scratch – Part 3

Eric Hansen Eric Hansen Profile: Eric Hansen

Probably the last post I'm going to make for the night (not sure, though) is about presenting the monitoring data. As mentioned, I was working on a backup solution previously.  In it, I used a Python module called Tornado to interact with HTTP requests that the client would issue.  This was...


April 21, 2013  10:18 PM

Writing a Full-Serviced Sysadmin App from Scratch – Part 2

Eric Hansen Eric Hansen Profile: Eric Hansen

I touched up on a bit regarding why I'm writing my own monitoring solution.  This will cover some of the design aspects I had thought of initially and talk some on how things have progressed since. One of the first things that came to me was an authentication system.  Right now its still...


April 21, 2013  9:53 PM

Writing a Full-Serviced Sysadmin App from Scratch – Part 1

Eric Hansen Eric Hansen Profile: Eric Hansen

For the past week or two now I've been working on an application to help monitor systems and services.  Kind of a bastard child of Nagios and Cacti.  There's a few reasons why I'm "reinventing" the wheel, so to speak.  But, I've decided to post here explaining the details, trials and...


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