lsof is a tool to list open files of processes

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How do I detect running processes using a library package?

This command is doing the rounds for detecting currently running processes using glibc: lsof | grep libc | awk '{print $2}' | sort | uniq I find it intensely annoying, since /libc/ matches not only ...
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Who's got the other end of this unix socketpair?

I want to determine what process has the other end of a unix socket, that was created with socketpair(). I have a program parent which creates a socketpair(AF_UNIX, SOCK_STREAM, 0, fds), and fork()s. ...
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lsof: show files open as read-write

When I try to remount a partition as read-only, I get an error /foo is busy. I can list all files open from /foo with lsof /foo but that does not show me whether files are open read-only or ...