[CentOS] Tar of files

Wed Mar 3 15:06:33 UTC 2021
Bernstein, Noam CIV USN NRL (6393) Washington DC (USA) <noam.bernstein at nrl.navy.mil>

Does anyone understand why there exists a "--numeric-owner" flag?  I replied off-list with the same information as others posted here, but the existence and docs for that flag at least imply that the default is usernames, not UIDs.