L3 Training & Consulting

So you want to monitor, continuously, the traffic in or out of your box on port 80. You want to monitor web traffic.

You’re going to run the following:

lsof -r -i:80


This will output something like the following:


COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
iTunes 3132 italisman 32u IPv4 0x808aa68 0t0 TCP 172.16.2.169:61644->akamai-072.sfo1.speakeasy.net:http (CLOSE_WAIT)
iTunes 3132 italisman 33u IPv4 0x7a15270 0t0 TCP 172.16.2.169:61731->akamai-071.sfo1.speakeasy.net:http (CLOSE_WAIT)
Safari 26240 italisman 9u IPv4 0x706f270 0t0 TCP 10.1.235.183:62762->95767-www1.affiliatemakeover.com:http (ESTABLISHED)
Safari 26240 italisman 12u IPv4 0x70c5a68 0t0 TCP 10.1.235.183:62759->209-20-80-227.slicehost.net:http (ESTABLISHED)
Safari 26240 italisman 13u IPv4 0x71e666c 0t0 TCP 10.1.235.183:62778->192.217.199.107:http (ESTABLISHED)
Safari 26240 italisman 16u IPv4 0x808ae64 0t0 TCP 10.1.235.183:62777->track1.mbl.vip.sp1.yahoo.com:http (ESTABLISHED)


I tripped over the behavior in the Spotlight menu the other day of being a calculator.

You can just type in numbers with the following operators:

• + (add)
• - (subtract)


• “/” (divide)


• * (multiply)

Just like so:

A cool little utility that you can use to remote capture the screen and possibly scp it to yourself…

To capture the screen to a file on your desktop called testcap.png:

screencapture ~/Desktop/testcap.png