Tadek’s Blog

How to (approximately) generate a top-N items list without counting the number of occurrences of all instances? Two interesting papers I found on the topic: http://citeseer.ist.psu.edu/charikar02finding.html and http://citeseer.ist.psu.edu/jin03dynamically.html. I also somebody’s seminar powerpoint presentation explaining it.

While playing with OSX I was wondering how to find out all the networks connections a particular process owns. On Linux I’d use netstat -p for this, which does not work on OSX.

It turns out that the solution is quite simple - lsof -i does the job and works on both Linux and OSX. Two other useful commands:

lsof -ai -p PID    # all connections/sockets owned by PID
lsof -i:PORT       # lists all connections/sockets with a particular PORT.