You can use bind to bind a key to some function. Here is what I did:

bind '"ea": ". ~/newScript.sh

" '

Here newScript.sh is the file which changes the tty and ea means that whenever Alt+A is pressed, the script executes.

The contents of newScript.sh are:

#! /bin/bash

ttyNum="$(tty)"

ttyNum=$(echo ${ttyNum##*y})

ttyNum=$(( (ttyNum +1) % 7))

chvt $ttyNum

Note that if you want to store the key bindings permanently, you can store them in your `~/.inputrc' file. For more information, you can visit this link: http://www.techrepublic.com/article/find-and-bind-key-sequences-in-bash/5683375

Update: You can store the bind line in your ~/.bashrc file so that you don't have to do it again.