You must have at least 4MB of memory and 35MB of available hard disk
space. If you want to install a reasonable amount of software,
including the X Window system, and some development programs and
libraries, you’ll need at least 300MB. For an essentially full
installation, you’ll need around 800MB. To install _everything_
available in Debian, you’ll probably need around 2GB. Actually,
installing everything doesn’t make sense because some packages
provide the same services.