script som bevakar filutrymme

#!/bin/sh
# set -x
# Shell script to monitor or watch the disk space
# It will send an email to $ADMIN, if the (free available) percentage of space are >= 90%.
# Requirements: You need bash-shell and functioning mail server.
# ----------------------------------------------------------------------------------------------------  ----
#
# Set admin email
# In /root/.mailrc you will find admins group defined
ADMIN="admins"
#
# set alert level, 90% is default
ALERT=90
#
# Exclude list of unwanted monitoring, if several filesystems then use "|" to separate the filesystems.
# Also possible to exclude words like "Filesystem" and so on.
# An example: EXCLUDE_LIST="/dev/hdd1|/dev/hdc5"
EXCLUDE_LIST="^Filesystem|tmpfs|cdrom|none|/auto/ripper|/auto/backup"
#
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::  :::::
#
# Main program start
#
function MAIN() {
while read df_output;
do
   USED=$(echo $df_output | cut -d'%' -f1)
   FILESYSTEM=$(echo $df_output | awk '{print $2}')
   if [ $USED -ge $ALERT ] ; then
      echo "Running out of space \"$FILESYSTEM ($USED%)\" on server $(hostname), $(date)" >> /tmp/disk.status.txt
   fi
done
}
#
# Main program END
#
df -H | grep -vE "$EXCLUDE_LIST" | awk '{printf("%s \t %s\n",$5,$6)}' | MAIN


# Send an email and delete status file
if [ -f /tmp/disk.status.txt ] ; then
   mail -s "Alert: Almost out of disk space on server $(hostname)" $ADMIN < /tmp/disk.status.txt
   rm /tmp/disk.status.txt
fi