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Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
In the Linux Security forum we often ask victims of (perceived) security breaches to gather log files and parse them for leads using Logwatch. Analysis is best done on a physically separate, known secure machine in a safe network. If left unmodified Logwatch configuration defaults will result in it picking up the machines logs instead of the compromised machines logs. Here is a patch for install_logwatch.sh that will install Logwatch in a temporary directory and prepare it for receiving log files...
ERROR with rpm_check_debug vs depsolve:
rpmlib(PayloadIsXz) is needed by opera-11.60-1185
(1, [u'Please report this error in http://bugs.centos.org/set_project.php?project_id=16&ref=http://bugs.centos.org/bug_report_page.php?category=yum'])
If you run into the above warning and are unable to get Opera installed the you should be aware of how Opera responded:
Anyone who is interested in iptables performance will find Harris, Melara, Smith and Nico's "Performance analysis of the Linux firewall in a host" (2002) and Kadlecsik and Pásztor's "Netfilter Performance Testing" (2005). But what actually is the effect of a large rule set on performance?
The attached PDF I created is not an an exhaustive study of Netfilter performance but shows you Jperf data and pictures (joy!) for plain rule sets, ipset (iphash) and the iptables...
The question: generate an audit trail that includes captured traffic and process information.
The problem: when capturing packets no process information is stored.
Solution: correlation provides the "glue" between...
I've been mulling (yes, mulling) replacements for RKH's suspscan for a while now. Suspscan was an experiment to see if there could be a more generic, less name-based way of finding malware. The resultant monstrosity is resource-intensive, impossible to configurable and rarely used. Researching something else (as usual) I came across this rather good presentation (PDF) about creating ones own AV signatures: Writing ClamAV Signatures and not long after that I found R-fx Networks' Linux Malware Detect....