bash - printinfo.sh

#!/bin/bash
COMMANDS=(dmesg
"cat /proc/asconf_info" "cat /proc/cpuinfo"
"cat /proc/meminfo" free mount df "apt-get moo"
)

function info {
    echo
    echo "$user@$host:>$*"
    $*
}

user=`who | awk '{print $1}'`
host=`hostname`
uname -a
i=0
while [ $i -lt ${#COMMANDS[*]} ]; do
    cmd=${COMMANDS[$i]}
    #if cat then check file is exist
    if [ "${cmd:0:3}" = "cat" ]; then
        if [ -e ${cmd:4} ]; then
            info $cmd
        fi
    else
        info $cmd
    fi
    let i=i+1
done