The wifi tools are on the DVD disk but did not install.

What version of Debian, what make/model computer, and what wireless chipset?

This post tells you how to determine the chipset; that piece of information is critical: http://www.linuxquestions.org/questi...ux-4175434970/

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I have an HP G42 laptop with a Broadcom BCM4313 802.11b/g/n wireless card.

You could install them the hard way.

# mount -o loop -t iso9660 dvd.iso /mnt/loop
# find /mnt/loop -iname '*wifi*'
# dpkg -i /long/path/to/deb/file/*file*.deb
# umount /mnt/loop

or something similar with mount for /dev/cdrom or /dev/sr0.

But most times it's just easier to setup a wired network connection and apt-get the packages. Or use something like dselect to create your apt sources as the distro supplied discs and use dselect to pull them from that location.

Broadcom wifi devices can be a bit of a hell to get working. But they can be made to work in most cases.