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When I type "df -h" in my terminal, the following is the output:

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              38G  7.1G   29G  20% /
none                  498M  248K  497M   1% /dev
none                  502M  1.1M  501M   1% /dev/shm
none                  502M  104K  502M   1% /var/run
none                  502M     0  502M   0% /var/lock
none                  502M     0  502M   0% /lib/init/rw

FWIW, this is a VM image running Ubuntu 10.04.4...

What's up with all the none partitions, and how can I combine them all (assuming they're not needed)?

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up vote 1 down vote accepted

Those are all virtual file systems created by the Linux kernel. They contain device nodes and other directories required for UNIX programs to function properly.

This page looks like a comprehensive guide to the UNIX file system:

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