How to configure bash to have nice auto-completion.

$include /etc/inputrc
set completion-ignore-case on
set completion-query-items -1
set show-all-if-unmodified on
set show-all-if-ambiguous off
set colored-completion-prefix on
set colored-stats on
set visible-stats on
"\C-j": menu-complete
"\C-k": menu-complete-backward

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

#!/bin/bash
 
echo "          My System information script."
echo " "
echo " "
 
echo "The computer has: $(awk < /proc/meminfo '{ if ($1 == "MemTotal:")
 { print $2 }}') Kilobytes of RAM."
echo "The kernel version is: $(uname -r)."
echo "There is: $(df -Hla / | awk '/dev/ {print $3 " remaining of",$4 " \
on the / partition."}')"
echo "The load average is: $(cut -f1 -d ' ' /proc/loadavg). The CPU has\
 $(grep -c ^processor /proc/cpuinfo 2>/dev/null) cores."
echo "Current CPU usage is: $(top -bn 2 -d 0.01 | grep '^%Cpu' | \
tail -n 1 | awk '{print $2+$4+$6}')%"
echo "There are $(ls /var/cache/apt/archives/ | wc -l) packages in\
 the /var/cache/apt/archives/ directory."
echo "This is the arp table:"
echo " "
echo "$(cat /proc/net/arp)"
echo " "

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    alias dir='dir --color=auto'
    alias vdir='vdir --color=auto'
 
    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi