Choosing UNIX / Linux Operating System Vendor / Software

Posted on in Categories GNU/Open source, Hardware, Howto, HP-UX, Linux, Linux distribution, package management, RedHat/Fedora Linux, Sys admin, Tips, UNIX, Windows server last updated July 4, 2008

UNIX or Linux distros offers many flavors. Managing many UNIX like operating systems can be difficult. Here are few tips about selecting one perfect operating system for your business and sticking it with to save both money and time.

scapy – Interactive Packet Manipulation / Generation Tool for Linux / UNIX

Posted on in Categories Debian Linux, Hardware, Linux, Security, Ubuntu Linux, UNIX last updated January 28, 2008

Recently I started to play with scapy – a powerful interactive packet manipulation and custom packet generation program written using Python. Please note that this tool is not for a new Linux / UNIX users. This tool requires extensive knowledge of network protocols, packets, layers and other hardcore networking concepts. This tool is extermly useful for
a] Understanding network headers
b] Testing network security
c] Write your own utilities using scapy
d] Decoding protocols etc

From the man page:

You can use this tool to check the security of your own network as it allows to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more. It can easily handle most classical tasks like scanning, tracerouting, probing, unit tests, attacks or network discovery. It also performs very well at a lot of other specific tasks that most other tools can’t handle, like sending invalid frames, injecting your own 802.11 frames, combining technics such as VLAN hopping+ARP cache poisoning, VOIP decoding on WEP encrypted channel, etc.

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Advanced techniques for using the UNIX/Linux find command

Posted on in Categories Howto, Linux, News last updated May 9, 2006

IBM developerWorks published new article for Intermediate Linux/UNIX users. Explore the vast terrain of the UNIX file system with the find command. One of the most powerful and useful commands in the UNIX programmer’s repertoire is find. All flavors of UNIX have file systems that can contain thousands of files of many different types. With so many choices, locating a specific file, or set of files, can be difficult. The find command makes this task easier in many ways.

Read the article online.