Built from source.

Save this as dmg2iso and run from the terminal:

#!/bin/bash

if [ -z "${1}" ]; then
    echo "Usage: ${0##*/} <file>"
    exit 1
fi

FILE=${1%.dmg}
hdiutil makehybrid ${FILE}.dmg -o ${FILE}

Leopard users know how useful Quick Look can be, but using it from the command line is harder than it should be. After looking at other people’s solutions, I decided to write my own.

#!/bin/bash

#
# ql(1)
#
# Quick Look command for terminal use
#

if [[ ${#} -lt 1 || ${1} == "-h" || ${1} == "--help" ]]; then
    echo -e "Usage: ql [options] "
    echo -e "\t-t\tForce text mode"
else
    if [[ ${1} == "-t" ]]; then
        shift
        qlmanage -p -c public.plain-text "${@}" >& /dev/null &
    else
        qlmanage -p "${@}" >& /dev/null &
    fi
    PID=${!}
    PID_IN_USE=1
    while [ ${PID_IN_USE} ]; do
        PID_IN_USE=`ps | awk '{ print $1 }' | grep ${PID}`
        read -sn 1 -t 1
        if [[ ${?} -eq 0 && ${PID_IN_USE} ]]; then # user quit via GUI
            kill ${PID}
            exit 0
        fi
    done
fi

Besides saving on typing, this script has a few other advantages over the qlmanage command:

• It automatically returns the command line to you if you close Quick Look with the GUI (after a short delay)
• You can force plaintext mode for text files that don’t have generators configured (for example, CSS files by default) with the -t option.
• You can hit any key to close the Quick Look window.

Download ql here.