>>> I once read that it was possible to swap to a named file, rather
>>> than a swap partition. Is that possible with Jessie?
Of course, it's possible. But if you setup a system from scratch I'd
highly recommend you put "everything" into an LVM volume group so you
can then use an LVM volume for swap rather than a file (but with the
same advantages as using a file: it's easy to resize/create on-demand
at run-time).
Stefan
PS: I put "everything" between quotes because I'm not sure I'd recommend
to also put /boot in an LVM volume. IIUC it can be made to work
nowadays, but my systems still use a two-partition setup: one small
partition for /boot, and the rest for LVM.
