Shell Script To Notify Admin User if UNIX / Linux System Load Crossed Certain Limit
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#!/bin/bash # # Script to notify admin user if Linux,FreeBSD load crossed certain limit # It will send an email notification to admin. # # Copyright 2005 (c) nixCraft project # This is free script under GNU GPL version 2.0 or above. # Support/FeedBack/comment : http://cyberciti.biz/fb/ # Tested os: # * RedHat Linux # * Debain Linux # * FreeBSD # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- # Set up limit below NOTIFY="6.0" # admin user email id EMAIL="root" # Subject for email SUBJECT="Alert $(hostname) load average" # ----------------------------------------------------------------- # Os Specifc tweaks do not change anything below ;) OS="$(uname)" TRUE="1" if [ "$OS" == "FreeBSD" ]; then TEMPFILE="$(mktemp /tmp/$(basename $0).tmp.XXX)" FTEXT='load averages:' elif [ "$OS" == "Linux" ]; then TEMPFILE="$(mktemp)" FTEXT='load average:' fi # get first 5 min load F5M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f1)" # 10 min F10M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f2)" # 15 min F15M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f3)" # mail message # keep it short coz we may send it to page or as an short message (SMS) echo "Load average Crossed allowed limit $NOTIFY." >> $TEMPFILE echo "Hostname: $(hostname)" >> $TEMPFILE echo "Local Date & Time : $(date)" >> $TEMPFILE # Look if it crossed limit # compare it with last 15 min load average RESULT=$(echo "$F15M > $NOTIFY" | bc) # if so send an email if [ "$RESULT" == "$TRUE" ]; then mail -s "$SUBJECT" "$EMAIL" < $TEMPFILE fi # remove file rm -f $TEMPFILE
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Tags: awk command, basename, bash script, date time, debain linux, email notification, free script, freebsd, linux, linux system, load averages, mail command, mail email, message sms, shell script, short message, support feedback, sysem load, unix linux, uptime command ~ Last updated on: April 10, 2008
Doesn’t appear to work?
Even when the value from bc is 0 it still sends a email?