We normally netboot but we had a few machines that would not PXE, so we installed 14.04 via medium. Afterwards, some of the medium-installed machines were throwing this error in Nagios. Found this line in /etc/mtab on the afflicted hosts:
tracefs /var/lib/ureadahead/debugfs/tracing tracefs rw,relatime 0 0
This appears to be an artifact on the medium-based install process. I removed the above line and ran:
sudo service nagios-nrpe-server restart
Error condition cleared.
We normally netboot but we had a few machines that would not PXE, so we installed 14.04 via medium. Afterwards, some of the medium-installed machines were throwing this error in Nagios. Found this line in /etc/mtab on the afflicted hosts:
tracefs /var/lib/ ureadahead/ debugfs/ tracing tracefs rw,relatime 0 0
This appears to be an artifact on the medium-based install process. I removed the above line and ran:
sudo service nagios-nrpe-server restart
Error condition cleared.