I still consider myself a fledgling linux user, even though I run my own server box which I recently upgraded from Fedora Core 2 to Fedora Core 3. Especially
after signing up on these forums, I am convinced I am still quite green behind the ears.
Hence, I would like to ask the gurus to help me out in giving me a quick-and-dirty summary on how to use the "grep" and "tcpdump" commands effectively. Security is first and foremost on my mind, as I run an Apache webserver with MySQL and PHP, in addition to multiple gaming servers, off of the FC3 box. I have it sitting behind a Linksys (BEFSR41) router.
Basically I do a lot of looking through logs and analyzing network traffic. I feel these two commands would really help me out with that (especially in troubleshooting networking or server issues), but unfortunately I don't understand exactly how these work or how they're used very well.
Yes, I'm definitely still a