http://portswigger.net/suite/download.html
Burp suite allows an attacker to combine manual and automated techniques to enumerate, analyze, attack and exploit web applications. The various burp tools work together effectively to share information and allow findings identified within one tool to form the basis of an attack using another.

http://www.owasp.org/index.php/OWASP_WebScarab_NG_Project

WebScarab-NG is a complete rewrite of the old WebScarab application, with a special focus on making the application more user-friendly. To this end, WebScarab-NG makes use of the Spring Rich Client Platform to provide the user interface features. By using the Spring Rich Client Platform, WebScarab-NG automatically gains things like default buttons, keyboard shortcuts, support [...]

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One of things that seperates Ubuntu (or Debian based distribution) from other Linux distributions is that it disables the root account. For other distros such as Red Hat and SUSE, you are prompted for root password when it’s needed to perform a job or execute a command. You just log on as root or change [...]

The checksecurity command runs a small collection of simple system checks whcih are designed to catch a few common security issues. Checksecurity is run by cron on a daily basis. Several known hacker foot-prints are investigated on the system as well as a full system RPM verification. This program is not intended [...]