On Mon, Jun 29, 2026 at 11:37 AM Lorenz via Dng <dng@???> wrote:
>
> Hi,
>
> On Mon, Jun 29, 2026 at 4:36 PM Hendrik Boom <hendrik@???> wrote:
> >
> > what happens if during usrmerge you run out of space on /usr ?
> > does usrmerge back out gracefully, leaving the system intact?
>
> I don't know for sure, maybe it has some sefaguards. If you can read
> perl, usrmerge is a perl script
>
> >
> > is there a good way of estimating how much space will be needed
>
> roughly, the sum of the following
> # du -hs /bin
> # du -hs /sbin
> # du -hs /lib
> # du -hs /lib64
> what it does, I think, is to copy everything in the above dirs into
> their /usr counterparts,
> so /bin into /usr/bin and so on, and then it replaces /bin, /sbin and
> so on with symlinks to
> their user counterparts. It's not an atomic move, if you are wondering.
> you might need twice the above space because it may copy stuff in
> /bin /sbin/ /lib /lib64 to a backup before removing it (not sure).
> It's not a large amount of space, usually.
>
> > so i can repartition first if necessary?
>
> this question rings a bell: I'm not sure that's your case but I think
> the only thing that is not supported
> in a usrmerged system is to have a /usr partition separate from root.

Please - - - - could you check if this is true?

If it is this is why I cannot boot what I call my trial box.

I've been running these separate partitions
/
/boot
/usr
/usr/local
swap
/var
/home

for some almost 20 years.
Have had a lot of issues keeping /usr large enough (think this box is at
25 GB).


TIA