How do I get a List of programs connected to internet in linux?

Question

In linux, how can I get a list of programs that are currently connected to (and are receiving data) from the Internet?

Commands like iftop are good but does not show statistics based on process.

Answer 1

netstat will show you all established connections. Use -p for it to show the process associated with each one. It won't show you anything about the amount of data they're receiving though.

Answer 2

you can use lsof utility which lists information about files opened by processes

lsof -i

will show used internet resources only