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This check ensures that each member of a group actually exists in
Having non-existent users in
/etc/group implies incomplete administration practices. The user does not exist either because it has been mistyped or because it has not been removed from the group when the user has been removed from the system.
It is not recommended to have “ghost” users stay in
/etc/group. If a user with the same username where to be added at a later time, the user may have group privileges that should not be granted.
Remove non-existent users from
description: "This check makes sure that every member of a group actually exists."