Those people who are acquainted with ancient Greek mythology will know with no doubt the word Cronus, he was the father of the Greek Olympian Gods.The word Chronos means time in Greek and Latin and thus from the two words we get the words chronometer and chronology. Therefore in the programming lingo crontab means something that deals with the time.
To make it short Cron is a daemon that executes scheduled commands.
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In a former article (1 year ago) i used a java tool to see which DNS was faster among Google, OpenDNS and my local ISP, and the winner it’s been my local ISP; but I’ve recently discovered another nice tool that can do these tests, so today I want to re-check these 3 DNS servers with namebench
Namebench it’s a small program wrote in python that search for the fastest DNS server near to you.
Namebench runs a fair and thorough benchmark using your web browser history, tcpdump output, or standardized datasets (top 2000 Alexa) in order to provide an individualized recommendation. namebench is completely free and does not modify your system in any way. The project began as a 20% project at Google.
namebench runs on Mac OS X, Windows, and UNIX, and is available with a graphical user interface as well as a command-line interface.
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Article by James Hawkins
This is the second part of our guide on Nmap, you can find the first part here, in this part of the tutorial we’ll see other configurations that you can use with Nmap to avoid firewalls or debug the information obtained.
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Yesterday has been released the version 5.0 of Trisquel, an Ubuntu based GNU/Linux Distribution.
In their announcement:
In what we can now call it a tradition, we celebrate the Software Freedom Day by publishing our latest release: Trisquel GNU/Linux 5.0 STS, codename Dagda.
Article by James Hawkins
As we all know, Nmap (Network Mapper) is a stealth port scanner widely used by network security experts (including forensics & Pen-testing Experts). In this article we’ll see the different types of Nmap Scans, its techniques, understanding the purpose and goals of each scan , its advantages or disadvantages over other scanning tools, which could be better at evading firewalls & IDS (To a certain extent) and much more. In this first part, I have made my best to explain the basic scanning techniques, Host discovery options, port scanning options, techniques used in detecting Operating system & services running on the system.
i also give Nmap as already installed on your system.
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