wget ftp://ftp.knoppix-math.org/pub/knoppix/knoppix_v6.2.1-math-dvd-icms2010-20100730-en.iso
wget ftp://ftp.knoppix-math.org/pub/knoppix/knoppix_v6.2.1-math-dvd-icms2010-20100730-en.iso.md5
wget ftp://ftp.knoppix-math.org/pub/knoppix/knoppix_v6.2.1-math-dvd-icms2010-20100730-en.iso.sha1