Linux统计根分区使用率

 #!/bin/bash

 # 统计根分区使用率
 # 作者: shaohsiung
 # 时间: //

 rate=$(df -h | grep "dev/sda3" | awk '{print $5}' | cut -d "%" -f1)

 if [ $rate -ge  ]
     then
         echo "Root partition usage exceeds 80%, mail has been sent to the administrator..."
 fi