From the category archives:

Unix / Linux

The Great Zero Challenge

September 7, 2008

The Great Zero Challenge: A challenge to confirm whether or not a professional data recovery firm or any individual(s) or organization(s) can recover data from a hard drive that has been overwritten with zeros once. All they used is the Unix dd command using /dev/zero as input to overwrite the drive.
They are doing this because [...]

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Bastille Linux

February 4, 2008

Besides manual security hardening of a Linux OS, let’s check out a free open-source tool to automate and simplify the process. Bastille will disable unnecessary services and install operating system updates as well as configure a firewall, enforce password policies, create a second root-level account and more. What’s nice is that Bastille leads the user [...]

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How to Remove Duplicates from a List

January 28, 2008

Sometimes when running through a CSV or any kind of a log file, you may encounter lists with a lot of duplicates. I will show an example of the simplest order here.
Say, you have a duplicates.txt that goes
one
two
three
one
four
two
four
Now, how to remove duplicates from a list such as the one shown above. If you use a [...]

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Unix Shell for Windows

January 19, 2008

A lot of us who use Linux at work/school or have always grown up using Unix commands and using the Unix shell for years and more often than not, there are instances where a ls command comes more naturally than the dir command at the command prompt when using Windows.
For the most part, a lot [...]

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