This is an old revision of the document!
Unsorted stuff goes here I guess
Some simple usage:
all packets arriving at or departing from 192.168.0.2 # tcpdump -n host 192.168.0.2
To print traffic between 192.168.0.2 and either 10.0.0.4 or 10.0.0.5: # tcpdump -n host 192.168.0.2 and \( 10.0.0.4 or 10.0.0.5 \)
To print all IP packets between 192.168.0.2 and any host except 10.0.0.5: # tcpdump ip -n host 192.168.0.2 and not 10.0.0.5
To print all traffic between local hosts and hosts at Berkeley: # tcpdump net ucb-ether
To print all ftp traffic through internet gateway xx: # tcpdump 'gateway xx and (port ftp or ftp-data)'
To print traffic neither sourced from nor destined for local hosts (if you gateway to one other net, this stuff should never make it onto your local net). # tcpdump ip and not net localnet
To print the start and end packets (the SYN and FIN packets) of each TCP conversation that involves a non-local host. # tcpdump 'tcp & 3 != 0 and not src and dst net localnet'
To print IP packets longer than 576 bytes sent through gateway xx: # tcpdump 'gateway xx and ip[2:2] > 576'
To print IP broadcast or multicast packets that were not sent via ethernet broadcast or multicast: # tcpdump 'ether & 1 = 0 and ip >= 224'
To print all ICMP packets that are not echo requests/replies (i.e., not ping packets): # tcpdump 'icmp != 8 and icmp != 0“
You found something interesing on the net and you don't know where to put it?? This is the place!
- Darik's Boot And Nuke - Darik's Boot and Nuke (“DBAN”) is a self-contained boot disk that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.
- http://www.lesswatts.org/ - Linux power saving projects (useful tips)
- Terminator - The goal of this project is to produce a useful tool for arranging terminals. It is inspired by programs such as gnome-multi-term, quadkonsole, etc. in that the main focus is arranging terminals in grids (tabs is the most common default method, which Terminator also supports).
- Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends.