linux下监控系统错误日志并发邮件的脚本

# vi /opt/scripts/os-log-alert.sh

#!/bin/bash

#Set the variable which equal to zero

prev_count=0

count=$(grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | egrep -wi 'warning|error|critical' | wc -l)

if [ "$prev_count" -lt "$count" ] ; then

# Send a mail to given email id when errors found in log

SUBJECT="WARNING: Errors found in log on "`date --date='yesterday' '+%b %e'`""

# This is a temp file, which is created to store the email message.

MESSAGE="/tmp/logs.txt"

TO="wbaiked@baiked.com"

echo "ATTENTION: Errors are found in /var/log/messages. Please Check with Linux admin." >> $MESSAGE

echo "Hostname: `hostname`" >> $MESSAGE

echo -e "\n" >> $MESSAGE

echo "+------------------------------------------------------------------------------------+" >> $MESSAGE

echo "Error messages in the log file as below" >> $MESSAGE

echo "+------------------------------------------------------------------------------------+" >> $MESSAGE

grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | awk '{ $3=""; print}' | egrep -wi 'warning|error|critical' >> $MESSAGE

mail -s "$SUBJECT" "$TO" < $MESSAGE

#rm $MESSAGE

fi