cat /cfg/make_qemu_disk.sh 
#!/bin/sh
if [ "${2}" == "" ]
then
        echo "USAGE: make_qemu_disk.sh diskpath size"
        exit 1
fi

qemu-img create -f qcow "${1}" "${2}" 



#!/bin/sh
#randomid=`cat /dev/urandom | strings | tr '\012' ' ' | head -c 3 | hexdump | head -n 1 | cut -d ' ' -f 2-8 | tr '[:lower:]' '[:upper:]' | cut -d ' ' -f 2-4 | tr ' ' ':'`
#mac="00:40:A6:${randomid}"
#echo "${mac}"
#echo -n '00:40:A6'; dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -An -txC | sed 'y/abcdef /ABCDEF:/'
#printf "00:40:A6:%02X:%02X:%02X\n" $(dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -An -tu1)
#echo -n '00:40:A6:'; dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -tx1 | head -n 1 | sed 's/^[^ ]\+ \(.\+$\)/\1/;y/abcdef /ABCDEF:/'
#echo -n '00:40:A6'; dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -An -txC | sed 's/ /:/g' | tr '[:lower:]' '[:upper:]'
#echo -n '00:40:A6'; dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -An -txC | sed 's/ /:/g' | tr '[:lower:]' '[:upper:]'
#echo -n "00:40:A6:" && dd if=/dev/urandom  bs=3 count=1 2> /dev/null | hexdump | head -n 1 | cut -d ' ' -f 2-4 | tr '[:lower:]' '[:upper:]' |  tr -d ' ' | cut -c 1-6 | sed 's/../&:/g' | cut -d ':' -f 1-3
#echo -n "00:40:A6:" && cat /dev/urandom | strings | tr '\012' ' ' | head -c 6 | hexdump | head -n 1 | cut -d ' ' -f 2-4 | tr '[:lower:]' '[:upper:]' |  tr -d ' ' | cut -c 1-6 | sed 's/../&:/g' | cut -d ':' -f 1-3
#echo -n "00:40:A6:" && cat /dev/urandom | strings | tr '\012' ' ' | head -c 6 | hexdump | head -n 1 | cut -d ' ' -f 2-4 | tr '[:lower:]' '[:upper:]' |  tr -d ' ' | cut -c 1-6 | sed 's/../&:/g' | cut -d ':' -f 1-3
#echo -n "00:40:A6:" && cat /dev/urandom | strings | tr '\012' ' ' | head -c 6 | hexdump | head -n 1 | cut -d ' ' -f 2-4 | tr '[:lower:]' '[:upper:]' |  tr -d ' ' | cut -c 1-6 | sed 's/\(..\)/\1:/g' | cut -d ':' -f 1-3

printf "00:40:A6:%02X:%02X:%02X\n" $(dd if=/dev/urandom  bs=3 count=1 2> /dev/null | od -An -tu1)