flow

The flow command sets X.3 parameter 5.

It enables or disables local flow control processing of XON and XOFF characters. Switching flow control on, using flow on, lets you use Ctrl-s to halt terminal output and Ctrl-q to restart it. If you are using an application that needs to use these control characters for other purposes, for example an EMACS-type editor, turn flow control off. By default, flow control is on.

Entering flow without a parameter displays the current setting.