Command execution resulting in "No such file or directory" messages, why?

Issue

• Executing administration commands result in the message "No such file or directory", why?

# mount -o remount /
mount: block device /dev/VolGroup00/LogVol00 is write-protected, mounting read-only
# pwd
/root
# touch test
touch: cannot touch `test': Read-only file system
# uptime
 02:06:28 up 113 days, 10:17,  2 users,  load average: 0.21, 0.07, 0.09
# lvchange
  File-based locking initialisation failed.
# umount /
# fsck /dev/mapper/VolGroup00-LogVol00
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
/dev/mapper/VolGroup00-LogVol00: recovering journal
fsck.ext3: Bad magic number in super-block while trying to re-open /dev/mapper/VolGroup00-LogVol00
e2fsck: io manager magic bad!
# mount -o remount,rw /
mount: block device /dev/VolGroup00/LogVol00 is write-protected, mounting read-only
# ll /dev/VolGroup00/LogVol00
-bash: /bin/ls: No such file or directory
# ll /dev/VolGroup00/
-bash: /bin/ls: No such file or directory
# cd /dev
# ll
-bash: /bin/ls: No such file or directory
# ls
-bash: /bin/ls: No such file or directory