linux df 监控磁盘空闲空间

df 监控磁盘空闲空间

环境：

[oracle@simpleit shell]$ uname -a
Linux simpleit.domain.cn 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 athlon i386 GNU/Linux
[oracle@simpleit shell]$ cat /etc/redhat-release
CentOS release 5.5 (Final)

[oracle@simpleit shell]$ df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda2              5952284   4627568   1017476  82% /
/dev/sda1               101086     29931     65936  32% /boot
tmpfs                   505360         0    505360   0% /dev/shm
[oracle@simpleit shell]$ df -kl
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda2              5952284   4627568   1017476  82% /
/dev/sda1               101086     29931     65936  32% /boot
tmpfs                   505360         0    505360   0% /dev/shm

df displays the amount of disk space
       available on the file system containing each file name argument.  If no file name is  given,
       the  space available on all currently mounted file systems is shown.  Disk space is shown in
       1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which  case
       512-byte blocks are used.

-k     like --block-size=1K

-l, --local
	  limit listing to local file systems

一个小脚本：

####################################################################
##    disk_free_space.sh       ##
##    created by Laughing      ##
##       2012-01-06            ##
####################################################################
#!/bin/bash

df -kl | grep -iv Filesystem | awk '{ print $6", "$5}' |
while 
read LINE;
do
ITEM=`echo $LINE | awk -F ',' '{ print $2 }' | awk -F '%' '{ print $1 }'`
if [ $ITEM -ge 90 ]
then
    echo "`date` - ${LINE} space used on `hostname` "
fi
done

[oracle@simpleit shell]$ ./disk_free_space.sh
Sun Dec 18 16:10:25 CST 2011 - /, 82% space used on simpleit.domain.cn
Sun Dec 18 16:10:25 CST 2011 - /boot, 32% space used on simpleit.domain.cn