Hi,
I am trying to make a script in which the user is notified once the disk space of the environment increases a particular threshold.
I have made a script for it but I am facing an error while executing it.
Could any one here guide me further??
Script
#!/bin/sh warninglimit=350000
lowlimit=250000 filesystems="/export /home/t2/" for fs in $filesystems
do
size=`df -k $fs|grep $fs|awk '{ print $4; }'`
if [ $size -le $lowlimit ]
then
mailx -s "URGENT: Low disk space for $fs ($size)" -r abc@sd.com break
fi
if [ $size -le $warninglimit ]
then
mailx -s "WARNING: Low disk space for $fs ($size)" -r abc@sd.com fi
done
Error- df: open of /export failed
test.sh[10]: test: Specify a parameter with this command.
test.sh[15]: test: Specify a parameter with this command.
As it already says, the df for /export fails. So the variable $size will not contain anything useful.
Checking the line where you define $size, we see your variable $fs, being part of the list $filesystems.
The problem is, that the "for" doesn't get the values of $filesystems as single elements - it takes them as one. And there is no filesystem called "/export /home/ts".
So add the line
Code:
IFS=" "
to help for/do/done to parse the value of $filesystems as single values.
Example:
Code:
root@isau02:/etc/apt> filesystems="/export /home/t2/"
root@isau02:/etc/apt> for bla in ${filesystems}; do echo ${bla}; done
/export /home/t2/ # it takes it as a single value, ignoring the blank
root@isau02:/etc/apt> IFS=" "
root@isau02:/etc/apt> for bla in $filesystems; do echo $bla; done
/export
/home/t2/
You can debug your shell scripts easily by echoing variables in between and use options like "set -x" or "set -xv".
As it already says, the df for /export fails. So the variable $size will not contain anything useful.
Checking the line where you define $size, we see your variable $fs, being part of the list $filesystems.
The problem is, that the "for" doesn't get the values of $filesystems as single elements - it takes them as one. And there is no filesystem called "/export /home/ts".
So add the line
Code:
IFS=" "
to help for/do/done to parse the value of $filesystems as single values.
Example:
Code:
root@isau02:/etc/apt> filesystems="/export /home/t2/"
root@isau02:/etc/apt> for bla in ${filesystems}; do echo ${bla}; done
/export /home/t2/ # it takes it as a single value, ignoring the blank
root@isau02:/etc/apt> IFS=" "
root@isau02:/etc/apt> for bla in $filesystems; do echo $bla; done
/export
/home/t2/
You can debug your shell scripts easily by echoing variables in between and use options like "set -x" or "set -xv".
Hi,
thanks for replying...
I got the point that something is wrong with my loop.
Could you guide me the way around this problem which could solve my purpose...
There is no problem with your loop itself.
The value of your variable $filesystems is interpreted as 1 value, not 2 which are separated by a blank. So your for-loop will take it as 1 value instead of 2. To fix this, you can add the following line
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