Shell has concatenative aspects: commands can be stacked while processing single data (command line) e.g.: $ timeout 1h notify <event> send-telegram <messa

Shell has concatenative aspects: commands can be stacked while processing single data (command line) e.g.: $ timeout 1h notify <event> send-telegram <message> here's we send <message> if <event> occurs within an hour (3 commands: `timeout`, `notify`, `send-telegram`).