[Cialug] jessie apt-get lock out

[Dan Hockey]

root at debian:~# apt-get update
Ign http://ftp.us.debian.org jessie InRelease
Ign http://ftp.us.debian.org jessie Release.gpg
Hit http://ftp.us.debian.org jessie Release
W: Not using locking for read only lock file /var/lib/apt/lists/lock
E: Couldn't create temporary file to work with
/var/lib/apt/lists/ftp.us.debian.org_debian_dists_jessie_Release - mkstemp
(30: Read-only file system)
W: Not using locking for read only lock file /var/lib/dpkg/lock
root at debian:~#


This is on a fresh install and this is what I got on the first try.
Then I tried...

root at debian:~# mount -o remount,rw /
mount: cannot remount /dev/root read-write, is write-protected

What should I try next?