Upload or update an entire directory

Sophisticated file transfer program.
More information: <https://lftp.yar.ru/lftp-man.html>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

mirror -R {{path/to/local_dir}} {{path/to/remote_output_dir}}

click the source code to copy install lftp on any operating system with command-not-found.com