This is a bug of sparky linux you should look on.
When I use a terminal emulator the autocompletion is not as smart as it could be. It does complete commands and pathnames but it does not complete subcommands. For example it does not complete any command after sudo. Also it can not complete subcommands like install after apt-get.
The bizarre thing is that autocompletion is smart on virtual terminal (ctrl+alt+F1). So this is not something that sparky does not have but something that does not work when I am on a terminal emulator as lxterminal, xfceterminal, xterm.
Anybody knows what is wrong?