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Which rpm did this file come from?

Need to know what rpm a certain file came from? Sometimes I want a certain program on one machine that I have on another, and my rpm searches come up blank. This happened with a program that I needed called lockfile, that I couldn't figure out how to install. It ended up being in the procmail-3.22-203.1 rpm.

The command I used was this:
rpm -qf /usr/bin/lockfile
I found that tip here:


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