ANONYMOUS wrote: (disappointing that no-one else has answered this) The & character is not an argument to your station-server. It is a token for your shell (on both Linux and macOS), requesting that the command be executed in the background: - the command is detached from the keyboard, so you cannot provide it with further input by typing - unless redirected (to a file, with > or to a pipe, with | ) the command's standard-output and standard-error streams will still appear on your terminal Because the command is detached from the keyboard, typing control-C, ^C, will not interrupt the command. You can kill all 'named' background commands with, say: killall station See: https://www.makeuseof.com/run-linux-commands-in-background/