Quoting Richard Owlett (rowl...@cloud85.net):
> Is your definition of "two root partitions" the same as mine?
> I'm new to *nix and have a have a physical machine set aside for
> "sink or swim" educational experiences.
> I use expert install and manual partitioning such that:
> first install would be to sda1 with swap on sda6
> second install would be to sda2 with swap on sda6
> etc etc
> This gives be multiple independent installs selectable from grub
> menu.
> [When I run out of space, reformat and repeat.]
> Not suitable for all, but it matches my learning style - retirement
> has advantages :)
Yes. I try to keep it as simple as possible. I stick to four primary
partitions with sda3 on /home.
Disk: /dev/sda
Size: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Label: dos, identifier: 0x00090d11
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 63 58396274 58396212 27.9G 83 Linux
/dev/sda2 58396275 117178109 58781835 28G 83 Linux
/dev/sda3 117178110 968944409 851766300 406.2G 83 Linux
/dev/sda4 968944410 976773167 7828758 3.8G 82 Linux swap / Solaris
sda1 in currently jessie / and sda2 is wheezy /. sda1 is mounted on
/agogj in wheezy and sda2 is /agogw in jessie (agog is the hostname).
To reduce confusion in mc (file manager), I chmod all the mount points
rwx------ so that I can't enter them when nothing's mounted there.
About the only issue in /home is that some of the dotfiles/directories
need to be symbolic links whose names contain the distribution because
different versions can't or shouldn't read each other's configurations,
like mc and mutt. And I copy all the ssh keys between the two
partitions.
Being simple-minded, I adduser on the new system with a script, rather
than mess around with password files. But one important thing to be
aware of is that files owned by system user/groups (like colord,
Debian-exim) will have different numerical owners so they mustn't be
moved by any method that preserves the number.
Lastly, I run grub-install on the newer system's partition only, or
things can get very confusing (because I like to fiddle with grub).
Cheers,
David.
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