How can have same as knoppix bash auto-complete function

[Stephen]

If you want it system wide then uncomment the section I have at the bottom in my /etc/bash.bashrc.

HappyTux:/home/stephen# cat /etc/bash.bashrc
# System-wide .bashrc file for interactive bash(1) shells.

# If running interactively, then:
if [ "$PS1" ]; then

    # set a fancy prompt (overwrite the one in /etc/profile)
    PS1='\u@\h:\w\$ '

    # check the window size after each command and, if necessary,
    # update the values of LINES and COLUMNS.
    shopt -s checkwinsize

    # enable bash completion in interactive shells
    if [ -f /etc/bash_completion ]; then
        . /etc/bash_completion
    fi
fi

Or if you just want it for certain users then you would uncomment the section in their /home/user_name/.bashrc.