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I have an embedded system with a read-only rootfs on which several services are masked.

The masking creates a symlink to /dev/null in /etc/systemd/system/.

The unmasking tries to remove the symlink but as the rootfs is RO, it fails successfully.

Is there a way to unmask said services without mounting rootfs in RW?

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You might try to create an overlayfs, re-mount it on /, and tell systemd to reload all services (systemctl daemon-reload).

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  • This way might be the right way. Unfortunately this change would not be trivial and for the moment I will not try it. I decided to just stop the services after boot.
    – ossx
    Commented Mar 27, 2019 at 10:30

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