When you first connect, you are in a /tmp/tmp.something directory which you can edit.
You can also do cd $(mktemp -d) and get a new one if you need another one.
You can write to /tmp. But since most people are also doing that, /tmp/date gets overriden frequently. I'd recommend mkdir /tmp/CZ-18; PATH=/tmp/CZ-18:$PATH; And then you can figure it out :)
I now feel like the most awesome tutorial following script kiddie ever.
Remember that you have write access to /tmp(/date) ;)