mounting /usr readonly

[Robert P. J. Day]

On Sun, 30 Dec 2007, John Summerfield wrote:

> Robert P. J. Day wrote:

... snip ...

> >   can i assume that, as long as nothing is open for write, the
> > read-only remount should work?  is there any other reason that i
> > would be told that the device is busy.  put another way, if i run
> > the above command and don't see an "F", should the remount always
> > work?

> Add ro to the mount options in /etc/fstab and see what complains.

but that wasn't the question.  again, if i try to, in one operation,
remount a filesystem readonly with "mount -o remount,ro", is the only
possible reason that remount could fail is if something on that
filesystem is open for writing, which would show up in the output of
"fuser -muv"?

or is it possible that that remount could fail because of "device
busy" and i run that fuser command and i don't see anything marked
with "F", which means there's another reason for the remount failure,
and what might that be?

i guess i could just download and RTFS.

rday
--

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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

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