I have installed ubuntu server on flash and have done a few things to minimise writes to disk. One of the things I have done is to direct a number of directories to ram via tmpfs. You can see how I have things set up below:

Filesystem           1K-blocks      Used Available Use% Mounted on

/dev/sde1              1290072   1228448         0 100% /

udev                   3990268         8   3990260   1% /dev

tmpfs                  4032204         0   4032204   0% /tmp

tmpfs                  1612884       296   1612588   1% /run

none                      5120         0      5120   0% /run/lock

none                   4032204         0   4032204   0% /run/shm

tmpfs                  4032204         0   4032204   0% /var/tmp

tmpfs                  4032204       564   4031640   1% /var/log

tmpfs                  4032204        16   4032188   1% /var/log/apt

/dev/md127           3845715976  35833316 3809882660   1% /massiveData

/dev/sde6              2401840     82872   2196960   4% /home

I received an email from my system saying the following. Anyone know what I should do to fix this?

/etc/cron.daily/man-db:

/usr/bin/mandb: can't write to /var/cache/man/5766: No space left on device

run-parts: /etc/cron.daily/man-db exited with return code 2