tab touch

[bruno]

Hello,
i don't know if it's the good name for the touch with two arrow
|<-------
--------->|
I hope.
Anyway, I want use this touch to auto complet command.
I mean complex command no just for the command
like this
ifc "tab touch" answer ifconfig
But like
apt-get "tab touch" answer nothing

or
apt-get install "tab touch"  answer nothing

and it's boring to find a package

question is :
"how enable this feature??

tks for answer
Bruno