#!/bin/bash


FIVE_MIN_LOADAVE= uptime | cut -d ',' -f4

if [ "$FIVE_MIN_LOADAVE" -ge "6" ]
then
echo "Everything is fine"
exit 2
fi

What I'm trying to do is check the load average on the system and send notifications of any problems.

I would like to work through the problem my self but I dont know how to convert a string to an integer. I get the fallowing error message:

[wade@localhost wade]$ bash loadtime
0.10
loadtime: line 6: [: : integer expression expected

Thanks,

You've got a few problems. First your line to capture the output of uptime doesn't work. To see this, try echoing your variable.

One reason it doesn't work is that you don't have the right syntax for capturing the output of a command into a shell variable. You need to enclose the command in `` (backquotes) or $( )

Secondly your cut operation doesn't return a number but the string :

load average: 0.36

(at least on my machine).

Finally the number you want to compare isn't an integer but a floating point and the shell doesn't support floating point arithmetic.

Tim

echo "This is the 5min load average:"

FIVE_MIN_LOADAVE=`uptime | cut -d ',' -f4`

echo "$FIVE_MIN_LOADAVE"

This will capture the 4th comma seperated field of the output of uptime. On my machine that's the string :

load average: 0.06

One way to get just the number is this :

FIVE_MIN_LOADAVE=`uptime | cut -d ',' -f4 |cut -f2 -d ':'`

Tim

#!/bin/bash

echo "This is the 5min load average:"

FIVE_MIN_LOADAVE=`uptime | cut -d "," -f4`

echo "$FIVE_MIN_LOADAVE"

if [ " $FIVE_MIN_LOADAVE " != " 0.* , 7.* , 8.* , 9.* , 10 " ]
then
echo "Everyting is fine."
else
echo "Somthing is eating your resources!"
exit 0
fi

What does the line :

echo "$FIVE_MIN_AVE" print out ?

#!/bin/bash

echo "This is the 5min load average:"

FIVE_MIN_LOADAVE=`uptime | cut -d "," -f4`

echo "$FIVE_MIN_LOADAVE"

if [ "$FIVE_MIN_LOADAVE" = "[6.*-10]" ]
then
echo "Everyting is fine."
else
echo "Somthing is eating your resources!"
exit 0
fi

I does give me the correct load average

.14

It dosen't work after all!

If I were you I'd investigate doing this with something that understands FP arithmetic, like Perl.

My next questionis, how do you compare two strings? One of the strings being a range from 6-10.

Here's a script that does about what you want (assuming you have perl installed) :

#!/bin/bash

FIVE_MIN_LOADAVE=$(uptime | cut -d ',' -f4 | tr -d 'a-zA-Z: ')
LIMIT=6.5

#echo "FIVE_MIN_LOADAVE=$FIVE_MIN_LOADAVE"

if perl -e "($FIVE_MIN_LOADAVE <= $LIMIT) or die"
then
echo "Everything is fine"
else
echo "Everything is not fine."
exit 2
fi