[K12OSN] No one can log in! Advice please.

[Joseph Bishay]

Update!

So it ends up that the lack of space is because the OS is including
the hard drive space from the backup server that is mounted in /mnt!

Situation:
There is the main k12ltsp server.  37 GB drive.  There is an 80 GB
drive in another fedora core 4 machine that is acting as a backup
machine (every night it rsyncs, every week or so it does a
mondoarchive and stores the ISOs).

That backup machine is mounted via NFS to ther k12ltsp's /mnt
directory.  'mount -l' shows:

/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)

the command to mount it is the last line in rc.local:
mount k12backup:/k12backup /mnt/backup -o rsize=8192,wisze=8192

'df' shows:

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      32566076  30912500         0 100% /
/dev/sda1               101086     16532     79335  18% /boot
tmpfs                  1037152         0   1037152   0% /dev/shm

Is there a solution to this?  I didn't realize it considers mounted
directories as part of the space and will prevent you from logging in.

Thank you.