Account Hygiene: Orphaned Home Directories

After a batch of offboardings, this NFS server's exported home tree at /export/home is out of sync with the account database: some home directories are owned by a UID that no longer has an /etc/passwd entry — classic leftover-access findings an auditor flags every time. Walk /export/home, identify every directory whose owner UID resolves to NO account, record their full paths (like /export/home/<name>), one per line, in the file /root/answers/orphaned.txt, then remediate by removing exactly those orphaned directories — leaving every home that still belongs to a real user untouched. (Maps to NIST AC-2 and 800-171 3.1.1.)