How to fix a terminal after a binary file has been dumped inside it?

I think reset would definitely fix it.

Consider looking into man page.

Example:

[m0nhawk@terra:~]> cat /dev/urandom
êIÉè;┤Ü)MåÇ▐¿÷¢§ôWdO┘&!π¡
[└█┼░▒┬┐@├err▒:·]> c▒├ /de┴/┤r▒┼do└

And resetfixes this.

Typing the command stty sane should fix it.

Best solution I've found is:

echo <ctrl-v><esc>c<enter>

I alias this to "unbinary"