> Yes, it's possible to share both swap partition and /home between
> distributions although the later might be a little bit tricky. Let's
> say, you paritioned the drive into 4 (primiary) ones:
>
> hda - / for distro 1
> hdb - swap
> hdc - /home
> hdd - / for distro 2
>
> When you boot to distro 1, your /etc/fstab (on hda) looks like:
> /dev/hda / ext3 defaults 1 1
> /dev/hdc /home ext3 defaults 1 2
> /dev/hdb swap swap defaults 0 0
PS on newer kernels the device names will probably be sd* rather than
hd* -- even for IDE devices: the new IDE controller exposes a
SCSI-like interface, AFAIR.
> Make sure that your UID is consistent between these two; i.e., if
> you create an account foo on both distro's, the UID on both distro's
> should be the same. The tricky part is that the program you compiled
> on distro 1 (and put in /home/foo/bin) might use different shared libraries
> than the one on distro 2. In this case, the program can only be run on
> distro 1 but not distro 2.
>
So anything in ~/bin should preferably be architecture-independent
scripts, or statically-compiled binaries. Of course, that won't help
you if /home is shared between two different architectures
(i386/x86_64 and ppc, perhaps)
Perhaps you can get by with compiling against a pre-defined LSB
target, though. Anyone knows how feasible that is in current
distributions?
Sharing between a Debian-derived and a Red Hat-derived distribution,
sticking to the Debian-style UID might be preferable. Red Hat and
other RPM distributions tend to start at 500, Debian at 1000, and as
far as I can tell anything above 500 on Red Hat is reserved for normal
users anyway.
--
Michel Salim
http://hircus.jaiku.com/
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