I was hoping someone could answer these questions:

I want to install Citrix ICA client. It comes in tar.gz. Please point me at a how to to install on debian (Knoppix).

I noticed when I install debian (not the knoppix install) that it runs something that checks for security patches. In addition to looking for updates (I assume the second part is get-apt update). What do I run to get the security updates?

Last question(s). I know there are packages of software for debian. How do I get a list of what is available and how do I find out what is installed on my current PC? dpkg something I would imagine.

Thanks for your help in advance.