Most powerful examples of Unix commands or scripts every programmer should know

Question

There are many things that all programmers should know, but I am particularly interested in the Unix/Linux commands that we should all know. For accomplishing tasks that we may

Answer 1

My personal favorite is the lsof command.

"lsof" can be used to list opened file descriptors, sockets, and pipes. I find it extremely useful when trying to figure out which processes have used which ports/files on my machine.

Example: List all internet connections without hostname resolution and without port to port name conversion.

lsof -i -nP

http://www.manpagez.com/man/8/lsof/