Re: keeping partitions mounted read-only
On Wed, 2003-08-20 at 10:35, Hans Wilmer wrote:
> Hi!
>
> Usually, I´m keeping partitions that can be mounted read-only, mounted that
> way. Especially the /usr partition is mounted ro.
>
> To install security-updates (or new packages), I remount /usr by issueing a
> ´mount /usr -o remount,rw´ so that the new software can be installed. After
> installation is finished, I remount the partition read-only by ´mount /usr
> -o remount,ro´.
>
> But more or less frequently, the request to remount the partition read-only
> fails with a message like ´mount: /usr is busy´. This is utterly annoying
> as I haven´t found any other way than rebooting in order to get the
> partition mounted read-only again.
>
> For example, I just installed the security upgrade of the man-db package on
> our mail server, and now I´m unable to remount the /usr partition read-only
> again. The mail server is use and I cannt reboot it now ... Another server
> is up for 271 days now, but the /usr partition is still mounted writeable
> since 200 days or so because of some software update, and an occassion to
> reboot it is not in sight.
>
> Is there any way to do the remounting without a reboot?
>
>
> GH
>
>
If a partition says its busy, find the offending process and stop it or
if necessary kill it. install lsof if you dont have it. then do
something like lsof|grep usr and see what shows up.
=Kev
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