Regarding nmap's netcat, I can confirm that the problem doesn't happen when using it. The second attempt at connecting to the socket results in a "Connection refused" and dies, while openbsd's just ...

If you’re running Mac or Linux, you will already have this command installed. lsof tells you what a process is currently talking to. It will list the process’ network connections and which files it’s ...

Use the LiSt Open Files (LSOF) utility to track data flow related to ports, users, and applications. LiSt Open Files (LSOF) is a Linux utility that allows you to view current network connections and ...

Click for a PDF with this and four other essential Linux articles. And, if you’ve ever heard anyone say that for Unix, everything is a file, you might not be too surprised to learn that lsof works ...

Click for a PDF containing this and four other essential Linux articles. Both of the aliases below will list whatever files are open on your behalf when you are logged in. I suspect that few sysadmins ...