change and print terminal line settings

-F, --file=DEVICE
       open and use the specified DEVICE instead of stdin

-g, --save
       print all current settings in a stty-readable form

-a, --all
       print all current settings in human-readable form

Commands separated  by  a ; are executed sequentially; the shell waits for each command to terminate in turn.  The
return status is the exit status of the last command executed.