Setting up disk space used monitoring

Setting up disk space monitoring

vi /usr/local/bin/get_fs_util

i(insert)

Paste the below

Basically just change the email and threshold, setup cron and your done!


Crontab -e -> insert the below for every 15 min checks
0,15,30,45 * * * * /usr/local/bin/get_fs_util >/dev/null 2>&1

# filesystem utilization and send email
#               if the threshold is exceeded.
#
#
# Directions:
#
# 1) Place this script in /usr/local/bin and make it executable:
#    vi /usr/local/bin/get_fs_util
#
#
#    chmod 755 /usr/local/bin/get_fs_util
#
# 2) Modify the variables below to set the email RECIPIENT, FILESYSTEMS
#    to be monitored (separated by a space if there are more than one)
#    and filesystem utilization percentage THRESHOLD.
#
# 3) Add a line to root's crontab similar to the following:
#
#    0,15,30,45 * * * * /usr/local/bin/get_fs_util >/dev/null 2>&1
#
#    In this example, this script will run every 15 minutes.
#
#    NOTE: The script does not have to be run by root. It can be run by
#          any user.
#
# 4) To test the script, change the THRESHOLD to a value lower than the
#    current utilized capacity, as reported by "df -k", and run the script
#    from the command line.
#

# User modifiable variables:
RECIPIENT="sysadmin@sitesnstores.com.au"
# change file systems to monitor below...
FILESYSTEMS="/" (You can check this with '# df -h' and you can select where you want to check)
THRESHOLD="20%"

# Do not modify anything below this line:
HOSTNAME=$(hostname | /usr/bin/tr '[a-z]' '[A-Z]')
for FS in $FILESYSTEMS
do
  UTILIZED=$(df -k $FS | /usr/bin/tail -1 | /usr/bin/awk '{print $5}')
  SUBJECT="Filesystem $FS on $HOSTNAME is $UTILIZED full!"
  MESSAGE="$SUBJECT Threshold is $THRESHOLD. Immediate System Administrator intervention is required."

# Define the email function:
  mail_alert ()
  {
  echo $MESSAGE | /bin/mail -s "$SUBJECT" "$RECIPIENT"
  }

# Compare the utilized value against the threshold:
  if [[ "$UTILIZED" > "$THRESHOLD" || "$UTILIZED" = "100%" ]]; then
        mail_alert
  fi

done

exit 0