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2.0.2: automatic updates on installations upgraded from 1.x - #37
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fs::copy opens an existing printr.old and then sets its permissions, which the kernel refuses (EPERM) when the file belongs to another user: the one left by install.sh (root) or scripts/deploy.sh. Every installation upgraded from 1.x stopped before installing. /opt/printr is group-writable, so the service can remove the file first.
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Remove the previous printr.old before keeping the current one: fs::copy failed with EPERM when it belonged to another user (install.sh, deploy.sh).