stty raw -echo

gistfile1.txt

raw (-raw)  If set, change the modes of the terminal so that no input or
                 output processing is performed.  If unset, change the modes
                 of the terminal to some reasonable state that performs input
                 and output processing.  Note that since the terminal driver
                 no longer has a single RAW bit, it is not possible to intuit
                 what flags were set prior to setting raw.  This means that
                 unsetting raw may not put back all the setting that were pre-
                 viously in effect.  To set the terminal into a raw state and
                 then accurately restore it, the following shell code is rec-
                 ommended:
                 

echo (-echo)
                 Echo back (do not echo back) every character typed.