Writing to a text file

[Geraint Jones]

I'm stuck! I want to write to a text file through a CGI script in 
append/truncate mode, but every time I am told I don't have permission. I'm 
running Linux, I've changed ownership and group to nobody and nogroup to no 
avail.

What do I have to do to get it to work? Security is not an issue (yet!).

Geraint.