Nagios check_disk

You are monitoring an Unix Ubuntu Server using nagios and the NRPE command « check_disk », and you are blocked on the following error :

DISK CRITICAL – /var/lib/ureadahead/debugfs/tracing is not accessible: No such file or directory

Simply run the command

mountall

It may display some errors, like « Device or resource busy » on your swap mount point, but finally it will work and generate the missing file.

/usr/lib/nagios/plugins/check_disk -w 20% -c 10%
DISK OK – free space: / 200000 MB (98% inode=99%);