Trouble with apt-get

[paramedic]

Hi
I'm running a Knoppix 3.2 Router(from CD) since a few Days and I Can't do any commands with atp-get such as atp-get update or atp-get install...
For Example I tried:

root@ttyp0[knoppix]# atp-get install firestarter
W:Not using locking for read only lock file /var/lib/dpkg/lock
E:Unable to write /var/cache/apt
E:The package lists or status file could not be pursued or opened

It's the same with install firewall.easy...
So I can't get a Firewall installed or my system updated.
So what to do?(I'm a Newbie)
Thanks

[NikiBob]

Unfortunatelly you can not install anything when you boot of CD. If you want add some new applications you have to install Knoppix to hard disk.

[Stephen]

You could look into using something like Arno's Iptables you should be able to run the script from the ramdisk while booted from the CD.

[plugwash]

how hard would it be to make knoppix symlink individual files rather than symlinking the dirs the files are in

then you could apt-get tuff onto the ramdrive