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At the Veeam Documentation, I read that the chattr and setfattr commands need to be supported:

I have read the following man pages:

I figured out that chattr is used to set attributes, e.g. cattr +i <filename> makes a file immutable.

But for what is the setfattr comand in context with Veeam used for? I searched for hours but did not figure it out.

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Veeam is backup software, so its goal is to be able to restore any file to exactly as it was, all file attributes included. Apparently it uses setfattr on restore to set extended attributes, if a backed-up file originally had them.

Extended attributes could be anything: SELinux security tags are handled by some filesystems as a specific form of extended attributes, for example. Veeam uses setfattr since it can handle all extended attributes, not just SELinux-specific ones.

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