[SHELL脚本练习]diskcheck.sh

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脚本检测磁盘使用率，自定义分区，自定义普通告警与严重告警阈值，实现邮箱告警需要先设置Mail_address，填写自己的邮箱即可

#!/bin/bash
#-d|--dir      The name of mounted on
#-c|--critical A very severe line of cliticel
#-w|--warning  A number line of warning
#-h|--help     For help of use information
 
Mail_address=
function Usages {
	echo "`basename $0` [-d|--dir PATH(mounted on name) -c|--critical NUM -w|--warning NUM -h|--help]"
}
 
	
 
if [ $# -eq 0 ];then
	Usages
	exit 1
fi
 
 
 
while [ $# -ne 0 ];do
case $1 in 
	-h|--help)
		Usages
		exit
	;;
	-d|--dir)
		DIR=$2
		[ -z $2 ] && echo "Parameter cannot be null....exit....." && exit 
		shift 2
	;;
	-c|--critical)
		CRITICAL=$2
		[ -z $2 ] && echo "Parameter cannot be null....exit....." && exit
		shift 2
	;;
	-w|--warning)
		WARNING=$2
		[ -z $2 ] && echo "Parameter cannot be null....exit....." && exit
		shift 2
	;;
	*)
		Usages
		exit 2
esac
done
USEAGE=`df -h|awk -v mount=$DIR '$NF==mount{print $(NF-1)}'|cut -d% -f1`
 
CTMSG="PROBLEM Service Alert:"$DIR" is CRITICAL,Used $USEAGE%"
 
WAMSG="PROBLEM Service Alert:"$DIR" is WARNING,Used $USEAGE%"
 
if [ $USEAGE -ge $CRITICAL ] 2> /dev/null;then
	echo $CTMSG | mail -s "PROBLEM Service Alert" $Mail_address
elif [ $USEAGE -ge $WARNING ];then
	echo $WAMSG | mail -s "PROBLEM Service Alert" $Mail_address
else
	echo "`date +%F' '%H:%M:%S`-Normal >> /var/log/diskcheck.log"
fi