are you trying to ask if you can run live linux WITHOUT a cd...??
then that would be no, as is the definition of "live" linux
if you mean can you INSTALL a copy of linux FROM the CD, then that is a yes... then you would have a Linux computer....
Read the manuals on the CD as to how to install onto HDD
I think on Knoppix... its on thier website:... yes it is:
To get Knoppix installed onto your hard drive:
1. Boot the Knoppix CD.
2. When the boot prompt comes up, choose your language.
Most of us speak English, so we'll type:
boot: knoppix lang=en
then press ENTER (you don't type the 'boot:' part, of course)
3. Wait till the system is fully launched, including the KDE desktop
4. Press CTRL-ALT-F1, to get a root console. You should see a shell prompt
5. Type: knx-hdinstall