Linux脚本实现文件系统使用率大于90%报警

Linux脚本实现文件系统使用率大于90%报警

disk_used.sh

#!/bin/bash
#Author:ztj
#Date:2023/5/6
#Description:磁盘使用率大于90%报警

NULLFILE=65

disk_filesystem=/tmp/filesystem.txt
> $disk_filesystem
df -h |grep -v "Filesystem" |grep -E  "^/dev" >$disk_filesystem

if [ ! -s $disk_filesystem ];then
  echo "$disk_filesystem is empty,please check it!"
  exit $NULLFILE
else
  while read line
  do
   if [ -n "$line" ];then
    name_disk=$(echo $line | awk '{print $1}')
#    echo $name_disk
    used_disk=$(echo $line | awk '{print $5}' | tr -d %)
#    echo $used_disk
    if [ $used_disk -gt 90 ];then
     echo "WARNING:the usage of $name_disk is above 90%."
    fi
   else
   exit 0
   fi
  done <$disk_filesystem
fi