encrypting /home partition post-install

[Patrick O'Callaghan]

On Tue, 2015-12-01 at 19:07 -0600, Chris Adams wrote:
> Once upon a time, Patrick O'Callaghan <pocallaghan at gmail.com> said:
> > On Tue, 2015-12-01 at 15:31 -0600, Chris Adams wrote:
> > > With LVM, I still get /dev/vg_foo/lv_bar, and
> > > don't care what raw device the underlying partition is, how it is
> > > connected, etc. (very useful for example when taking an internal
> > > drive from one computer and connecting it via an external adapter
> > > of
> > > some type on another).
> > 
> > Which is fine if a) the second machine also runs LVM (what if it's
> > on
> > an Ubuntu machine without LVM, rather than Fedora?) and b) the two
> > use
> > the same LVM logical layout.
> 
> For (a), the only Ubuntu system I have access to also has LVM; do
> they not even install the lvm tools?

I've no idea. I don't even have a Ubuntu installation. It was a
hypothetical question. For Ubuntu susbstitute Mint, Opensuse or
whatever. Not all Linux distros install LVM by default.

> For (b), I have no idea what you mean by "same LVM logical
> layout".  The PV size, VG and LV names, etc. are all part of a
> particular device. They don't have to match in any way a separate
> device (on the same or on a different computer).

A good demonstration of the problems with LVM terminology. What do you
mean by device? I often feel that many of the issues people have with
LVM are caused by this sort of thing. I last used LVM several years ago
and clearly remember reading over the docs multiple times before making
what should have been a simple change, before finally resorting to
asking the list. I don't doubt that people who use it every day are
comfortable with it, but most of us just don't, so if I had to repeat
the experience I would no doubt go through the same learning curve only
to forget it again when I finished.

poc