[editing rc.local on ro drive at boot]
As other people pointed out, the problem is that / is mounted read-only
when your system boots. There is a way to re-mount it read-write,
which is, of course, what the init scripts do as your computer boots.
There actually /is/ a command to do this, namely:
# mount -n -o remount,rw /
-n tells it not to try to update /etc/mtab, which it won't be able to
since it's on a ro filesystem.
Another slick trick to boot when your system is thouroughly hosed
is to pass init=/bin/sh to the kernel when you boot. If you
use LILO you would type something lsimilar to
LILO: linux init=/bin/sh
which would dump you straight into a root shell instead of running
all the init scripts. Then, you remount / as above, edit,
mount -o remount,ro /, run sync a few times and reboot (hard or soft).
Matt
--
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