Check free space on server and in OpenVZ containers

cronhourly-check-df-centos.sh

#!/bin/sh

( df -h | tail -n +2
  df -i | tail -n +2
  awk '/^\/vz/ {print $2}' /proc/mounts | xargs -r df -h | tail -n +2
  awk '/^\/vz/ {print $2}' /proc/mounts | xargs -r df -i | tail -n +2
) | grep -v ^none | egrep -v ' [ 1234567 ][0-9]% ' | sort | uniq \
  | mail -E -s 'Check-df warning' admins

cronhourly-check-df-debian.sh

#!/bin/sh

( df -h | grep -v ^none | egrep -v ' [ 12345678][0-9]% ' | tail -n +2
  df -i | grep -v ^none | egrep -v ' [ 1234567 ][0-9]% ' | tail -n +2
) | mail -E -s 'Check-df warning' admins