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Filesystem planning
Note that at this point, we have not even touched the machine. This is normal, as the more you plan in advance, the easier it will be to execute. Next you should determine how you need to partition your disks. Beginners can use one or two large partitions (e.g. / or / and /home), though from a security standpoint, especially on multiuser systems, it is not sufficient.
Multiuser systems should be protected from users actions, both malicious and accidental.
Historically, Unix systems crashed if the root partition fills. Modern Unix filesystems reserve 5-10% against this eventuality. For large drives allocate around 1-2%. For non-system partitions (e.g. /usr/local), its safe to set 0%.
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