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Help with script to display space usage

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# 1  
Old 10-13-2015
Help with script to display space usage
Hi all,

I am looking for help with a script for displaying the space available from a df - h command for / (root).
The problem is: If it is below 700 MB I have jobs that are failing... Is there a way I can do a calculation? If it above 700 MB it is good, if it is below 700 MB it will fail. Any help would be appreciated.

thanks,
Gartie
# 2  
Old 10-13-2015
How far have you come?

---------- Post updated at 18:25 ---------- Previous update was at 17:59 ----------

Howsoever, try
Code:
df --output=avail / | { read AV; read AV; [ $AV -gt 700000 ] && echo good || echo bad; }

This one asumes that exactly 700 MB is "bad".
This User Gave Thanks to RudiC For This Post:
gartie
# 3  
Old 10-13-2015
how far have I come.
Hi Rudic,

I have not gone far at all... I have just started on the script, and it is failing.
I am trying to get the script to read that anything in / below 700 MB is going to fail..

thanks

gartie
# 4  
Old 10-13-2015
Code:
df  >temp
while read a b c d e f
do
if [ "$f" = "/" ]
then
    if [ $d -gt 704000 ]
    then
    echo "OK"
    fi
fi
done <temp

It's easier to not use the -h option on df, just remember that the free space is in 1k blocks.
This User Gave Thanks to jgt For This Post:
gartie
# 5  
Old 10-13-2015
Quote:
Originally Posted by jgt
Code:
df  >temp
while read a b c d e f
do
if [ "$f" = "/" ]
then
    if [ $d -gt 704000 ]
    then
    echo "OK"
    fi
fi
done <temp

It's easier to not use the -h option on df, just remember that the free space is in 1k blocks.
The default unit on POSIX conforming systems is 512-byte blocks; not 1k. And, you can make it a little bit faster by just processing root. If you change the 1st line of the script above to:
Code:
df -k / > temp

and the rest of the script should be OK.
This User Gave Thanks to Don Cragun For This Post:
gartie
# 6  
Old 10-13-2015
df -kP is most portable IMHO.?
Code:
df -kP / |
{
read header
read a b c d e f
if [ $d -gt 704000 ]
then
  echo "OK"
else
  echo "NOT ok"
fi
}

This User Gave Thanks to MadeInGermany For This Post:
gartie
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