When installing Ubuntu (I guess a regular Debian installation won’t be any different), I sometimes would like to manually create or change partitions (by jumping to another terminal, e.g. using
Alt-F2) before doing the actual install. My preferred tool for that is
parted, however, on regular Ubuntu installation images (at least the server variety),
parted isn’t available from the console by default.
Today I noticed that (at least on today’s daily image of Ubuntu 16.04 Xenial), a
udeb file for
parted is available. This is how you install it:
udpkg -i /cdrom/pool/main/p/parted/parted-udeb_3.2-15_amd64.udeb
after which you can use parted to your heart’s content.
For more information on udebs see the Debian Installer Internals documentation.