reset

/usr/ucb/reset [options] [type]

Clear terminal settings. reset disables CBREAK mode, RAW mode, output delays, and parity checking. reset also restores undefined special characters and enables processing of newlines, tabs, and echoing. This command is useful when a program aborts in a way that leaves the terminal confused (e.g., keyboard input might not echo on the screen). To enter reset at the keyboard, you may need to use a linefeed instead of a carriage return. reset uses the same command-line arguments as tset.