1. 至/root/bin目錄下,新增一shell script的檔案,名為diskspace.sh,內容如下:
#!/bin/bash
df -h | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )
partition=$(echo $output | awk '{ print $2 }' )
if [ $usep -ge 90 ]; then
echo "Running out of space "$partition $usep%" on $(hostname) as on $(date)" | mail -s "Alert: Almost out of disk space $usep%" root
fi
done

2. # chmod 755 diskspace.sh

3. # crontab -e
-> 10 5 * * * /root/bin/diskspace.sh

資料來源:
http://go-linux.blogspot.com/
http://b2d.phc.edu.tw/modules/tadbook2/view.php?book_sn=23&bdsn=805
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