I've got some troubles with a tar file that holds a backup. It was provided by our hosting provider and contains some strange file permissions.

When viewing with

tar tvf example.tar

I only get the symbolic owner information of each file (which do not match existing users in /etc/passwd). Now I want to investigate whether the numerical values, which should also be stored inside the tar, hold the correct values. Is there a convenient way to do so?



There is the --numeric-owner switch that gives the information that you want

tar --numeric-owner -tvf example.tar


          always use numbers for user/group names

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