一个用来监控硬盘使用率的小脚本，用来监控当硬盘使用率超过一定限额就发邮件报警。
#!/bin/bash
ADMIN='localhost@localhost'
# set alert level 90% is default
ALERT=90
output=`df -H | grep -vE '^Filesystem|tmpfs|cdrom|已用' | awk '{ print $5 " " $1 }'`
while :
do
#echo $output
usep=`echo $output | awk '{ print $1}' | cut -d'%' -f1`
partition=`echo $output | awk '{ print $2 }'`
if [ $usep -ge $ALERT ]; then
mail -s "Alert: Almost out of disk space "$partition $usep" on $(hostname) as on $(date)" $ADMIN
fi
done
