Difference between /usr/lib/systemd/system and /etc/systemd/system?

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/usr/lib/systemd/system is a directory that should only contain systemd unit files which were put there by the package manager (YUM/DNF/RPM/APT/etc).






Files in /etc/systemd/system are manually placed here by the operator of the system for ad-hoc software installations that are not in the form of a package. This would include tarball type software installations or home grown scripts.









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