Australia photo & PC memo

"HEAD Asks for the response identical to the one that would correspond to a GET request, but without the response body. This is useful for retrieving meta-information written in response headers, without having to transport the entire content. GET Requests a representation of the specified resource. By far the most common method used on the Web today. Should not be used for operations that cause side-effects (using it for actions in web applications is a common misuse). See"

# tcpdump -ni eth0 host 192.168.0.1 

  (i specifies interfece, n is numeric output)

# tcpdump host [IP] -nnxX -s0 -l | tee /tmp/tcpdump.cap

# tcpdump -i eth1 -s0 -n -w /tmp/tcpdump.cap

  (-w is useful to read Wireshark(http://www.wireshark.org/))





# iptables -F [chain]    (Delete/Flush all rules in chain)

# iptables -L [chain] -n    (List the chain with numeric output)



# arping -I eth0 192.168.0.1    (which Ethernet device to use)



# time echo quite | telnet 192.168.0.1 8080