Do the NFSv4 root_squash and all_squash (and their no_ alternatives) export options have any effect if the filesystem is exported read only? Basically, all all these lines equivalent:


No, they are not equivalent. ro means that the whole file system is entirely read-only, regardless of the file permissions, but if root_squash is not set, root will be allowed to read files he might not be allowed to read if root_squash is set.

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