I was interested in entering the security Field and then I studied various posts about that. Someone told that I had to first know the unix system inside out form security perspective and then I can go further.
I know only basic Linux, my company has local server Ubuntu and VPS server centos 5. I manage that one by hosting sites and small other stuff like backups, cron, etc.
But i don't know anythin about logs etc. Someone wrote the following to start with:
watching live tcpdump sessions, syslog entries, web server logs, snort dumps, dumping live system memory, to a million other open source tools for peeking and poking at the innards of a running system.
Get a live SMTP server running, and watch the spam bots and scan for malware. Set up a web server and watch the script kiddies try SQL injection attacks in your web and DB logs. Watch your ssh logs for brute force attacks. Set up a common blog engine and have fun fighting off spam bots and attacks. Learn how to deploy various virtualization technologies to partition services from each other. Learn first-hand if ACLs, MAC, and system-level auditing are worth the extra work and hassle over standard system permissions.
Now I really want to dl all that stuff. Can anyone guide me any books to read. Video lectures, exams which can help me in doing that stuff.
Whenever I learn anything new with Linux I apply that to my live server. This is how I learned all the Linux.