OK you believe this FS is mounted ro you can check that with:
Code:
grep "\sro[\s,]" /proc/mounts
If that doesn't work for you then simple
and look to see how the FS was mounted.
If it's ro then remount with
Code:
mount -o rw,remount /
If this doesn't make the FS read/write then you might have ab FS issue and should run a check against it once you have unmounted it.