You only have to provide a controller, as this person did, if you want to use a real terminal: https://ajk.me/building-an-ibm-3270-terminal-controller https://

You only have to provide a controller, as this person did, if you want to use a real terminal: https://ajk.me/building-an-ibm-3270-terminal-controller https://ajk.me/building-an-ibm-3270-terminal-controller Otherwise, a TN3270 client program such as x3270 is enough: Hercules makes TN3270 clients appear to the mainframe operating system as though they were display stations connected to a channel-attached establishment controller. If you don’t want to install an X11 server, by the way, you can use the c3270 program that comes with the x3270 package.