saving the time zone

[lothario]

Hi,

I am in the US Pacific time zone. PST.
Knoppix boots with CET time zone.
I changed the time zone with tzconfig
But the change cannot be saved because KNOPPIX tells me
that /etc/timezone is on the READ-ONLY filesystem.

As long as my system is running my time zone stays at PST.
But after a reboot, it goes back to the CET time zone.
(And I have to update the time zone again.)

I am sure has resolved this.
Please tell me how to fix this.

Thanks.