Technology Insights

cut – Represent A Tab As The Delimiter With Linux cut Command

I have been using the cut command a lot recently to shed extra data from large text files. I typically use cut with a specific delimiter by activating the -d switch and I thought that the -d switch was required. It turns out that -d is not required and by default -d actually defaults to the delimiter being a tab. When you need to have a tab as the delimiter for cut you simply don’t specify the -d switch. Below I show a couple examples of a file trimmed down using cut with and without the -d switch as well as another way to convert tabs in a file to spaces which then will allow you to use the Linux cut command with the -d” ” switch.

Information Security

Backtrack 5: Information Gathering: Network Analysis: DNS Analysis: reverseraider

So many of the DNS enumeration scripts available in backtrack focus on typical DNS but reverseraider does what it sounds like it might do which is enumerate reverse DNS names. Enumerating reverse DNS on an IP or set of IP’s can sometimes reveal information you did not previously have. It is possible to be targeting a web server that has a bunch of virtual hosts and you prefer to track down primary web site on the web server which is where reverseraider may provide the results necessary as it is more likely that the most important site on the virtual web server has reverse DNS configured on the host itself. Below I display the primary three methods of using reverseraider.

Technology Insights

Create Symbolic Links Windows 7

While testing something earlier I needed to create a symbolic link on my laptop which is running Windows 7 Ultimate 64-bit. I first was going to use cygwin to create the symbolic link with ln however cygwin complained about it which is noted below in more detail. After receiving the error from cygwin I decided to look at the possible Windows commands and located mklink which is described in more detail below and will easily allow you to create symbolic links on a Windows 7 computer.