Published at LXer:
lsof is the sysadmin/security über-tool. I use it most for getting network connection related information from a system, but that’s just the beginning for this powerful and too-little-known application. The tool is aptly called lsof because it “lists openfiles“. And remember, in UNIX just about everything (including a network socket) is a file.Interestingly, lsof is also the Linux/Unix command with the most switches. It has so many it has to use both minuses and pluses.
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