Once you have gathered information about your computer's hardware, check that your hardware will let you do the type of installation that you want to do.
Table 3.2. Recommended Minimum System Requirements
|Install Type||RAM (minimal)||RAM (recommended)||Hard Drive|
|No desktop||64 megabytes||256 megabytes||1 gigabyte|
The actual minimum memory requirements are a lot less then the numbers listed in this table. Depending on the architecture, it is possible to install Debian with as little as 20MB (for s390) to 60MB (for amd64). The same goes for the disk space requirements, especially if you pick and choose which applications to install; see Section D.2, “Disk Space Needed for Tasks” for additional information on disk space requirements.
It is practically impossible to give general memory or disk space requirements for server installations as those very much depend on what the server is to be used for.
Remember that these sizes don't include all the other materials which are usually to be found, such as user files, mail, and data. It is always best to be generous when considering the space for your own files and data.
Disk space required for the smooth operation of the Debian GNU/Linux system
itself is taken into account in these recommended system requirements.
/var partition contains
a lot of state information specific to Debian in addition to its regular
contents, like logfiles. The
dpkg files (with information on all installed
packages) can easily consume 40MB. Also,
apt-get puts downloaded packages here before they are
installed. You should
usually allocate at least 200MB for
/var, and a lot
more if you install a graphical desktop environment.