The backsh is a program intended to be specified as a shell in a remote backup host computer, allowing potentially untrusted clients to backup data to the specified directory, without providing them remote access to a command shell or the ability to delete existing backup files. Consult the provided manual page for more information.
make install
[backup-client]$ tar czf - . |
> ssh backsh@backup-host.example.com backup-files backup.tar.gz
[backup-host]$ ls backup-files
20231214Z123456-backup.tar.gz