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Please pay attention to random failures.
https://mstdn.maud.io/@omasanoriIn regards to this question « how can I protect important data from accidental deletion? » https://distrowatch.com/weekly.php?issue=20210419#qa
BSD filesystems have flags supported per file/directory to set a file as immutable or append-only
https://man.openbsd.org/chflags#schg