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Tag Archives: -R

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Information Security

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

SecurityBy alexApril 1, 2012Leave a comment

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…

Technology Insights

Linux Sort By Date, List Files In A Directory By Date On A Linux Server

InsightsBy alexMarch 25, 2011Leave a comment

It can be useful on a Linux server to sort all of the files in a directory by date. Sometimes you may want to backup files older than a certain date or you may just want to see what is in a directory and what date those files were created. Use the information below to…

Technology Insights

Count How Many Files Are In A Directory And All Sub Directories On A Linux Server

InsightsBy alexJanuary 1, 20114 Comments

Counting files in Linux is fairly easy by simply listing the files using ls and then using the wc application. Both the ls application and the wc application are core Linux applications and should be installed by default on your server. One thing that I had forgotten how to do was how to count all…

Technology Insights

Use wget To Download All PDF Files Listed On A Web Page, wget All PDF Files In A Directory

InsightsBy alexDecember 22, 20102 Comments

Earlier tonight I was working on a project for a customer that wants to translate the Hebrew Interlinear Bible into English which obviously has been done many times before. This customer however has some translations that he wants to make for himself so I needed to find a Hebrew Interlinear Bible in text or PDF…

Technology Insights

CentOS Linux: sort: invalid option — R, Try sort –help for more information

InsightsBy alexAugust 8, 2010Leave a comment

I was working on an article a couple days ago with a friend and he had sent over some commands for me to reference in the article which included the “sort -R” command. The sort -R switch will randomly sort the contents of a file which is very useful in certain situations. The problem is…

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