To use the bash functions, simply source bash/bash_functions.sh in your ~/.bashrc
Use realpath bash/bash_functions.sh
to get the file to source in the ~/.bashrc
Also, get in ttyecho/ and :
$ cd ttyecho
$ make ttyecho
$ sudo make install
More info on it website : http://www.humbug.in/2010/utility-to-send-commands-or-data-to-other-terminals-ttypts/
After a git pull
do a source_all
or be sure to update correctly your terms.