topic Re: FileSystemAlert Script in Operating System - Linux

FileSystemAlert Script

Kyle D. Harris — Mon, 14 Jul 2003 12:39:04 GMT

Gents- The following script i have below for some reason isn't running. I use 60 % in my script just for testing purposes to see if it works since I currently have no file system even 90 % full. Can somebody please help me to see why this isn't running? I have it set in the crontab to run hourly. Thanks

Kyle

------------------------------------------
#!/usr/bin/sh
#Script Name: FileSystemAlert
#Author: Cpl Harris
#Date: July 10, 2003
#Purpose: To send out an email alerting admin when a filesystem is over 97 %

mark=1
while [ $mark = 1 ]
do
df | grep -v Filesystem |
while read line
do
MTP=$(echo "$line" | awk '{print $6}')
USE=$(echo "$line" | awk '{print $5}' | sed 's/.$//g')
if [ "$USE" > "60" ]
then
echo "$MTP $USE " | mail -s "FS alert" harriskd@mcsc.usmc.mil
sleep 100 #or whatever time
else
sleep 100 #or whatever time
fi
done
done

Re: FileSystemAlert Script

Claudio Cilloni — Mon, 14 Jul 2003 12:57:15 GMT

what kind of error do you get from this script?
I think that /usr/bin/sh (first line) isn't the correct path for the shell interpreter. In my system (Redhat 73) I must use /bin/sh.
I made this correction and the script seems to work (I executed it manually, not by cron).

You can check the exact location of sh so:

$ which sh

hth
Claudio

Re: FileSystemAlert Script

Balaji N — Mon, 14 Jul 2003 13:01:24 GMT

#!/bin/bash
mark=1
while [ $mark = 1 ]
do
df | grep -v Filesystem | while read line
do
MTP=$(echo "$line" | awk '{print $6}')
USE=$(echo "$line" | awk '{print $5}' | sed 's/.$//g')
if [ "$USE" -gt "30" ]
then
echo "$MTP $USE "
#echo "$MTP $USE " | mail -s "FS alert" harriskd@mcsc.usmc.mil
#sleep 100 #or whatever time
#else
#sleep 100 #or whatever time
fi
done
sleep 100
done

this script works.

1. use -gt for numeric comparisons. > for string comparisons.

2. dont put the sleep in if /else loops. for every line of ur df outptut the script will sleep. instead have it in the outer loop.

cheers
-balaji

Re: FileSystemAlert Script

Claudio Cilloni — Mon, 14 Jul 2003 13:06:10 GMT

mmmmh...

try this:
----------------------------------------------
#! /bin/sh

df | grep -v Filesystem |
while read line
do
MTP=$(echo "$line" | awk '{print $6}')
USE=$(echo "$line" | awk '{print $5}' | sed 's/.$//g')
if [ "$USE" -gt "60" ]
then
echo "$MTP $USE "
fi
done

------------------------------------------
If you wanna run it hourly in cron, you shouldn't use the external endless while loop, because that loop prevents the script to go to an end, so cron will start a new endless script every hour.

the "$USE" > "60" seems don't work, use -gt.

remember to complete the 'echo' line with the 'mail' command piped (I removed it just to test the script without sending mail).

Ciao
Claudio

Re: FileSystemAlert Script

John Meissner — Mon, 14 Jul 2003 13:19:42 GMT

In your previous post I went through and posted that i found the problem in my script... I then at the bottom posted the corrections to my script

#!/usr/bin/ksh
mark=1
while [ $mark = 1 ]
do
df | grep -v Filesystem |
while read line
do
MTP=$(echo "$line" | awk '{print $6}')
USE=$(echo "$line" | awk '{print $5}' | sed 's/.$//g')
if [ "$USE" > "60" ]
then
echo "$MTP $USE " | mailx -s "FS alert" sendto@work.com
sleep 100 #or whatever time
else
sleep 100 #or whatever time
fi
done
done

Re: FileSystemAlert Script

John Meissner — Mon, 14 Jul 2003 13:21:07 GMT

sorry... didn't read your entire post before i posted my last post...

Re: FileSystemAlert Script

John Meissner — Mon, 14 Jul 2003 13:27:21 GMT

ok... ugh... sorry for all these posts... I'm extreemly upset today becuase I'm buying a new car and the dealership is giving me the run around.... AHHHHHHHHHH

sorry...

anyway ... i would use the BASH shell not sh. That's what I originally scripted this in. (I put ksh in one of the last posts becuase I'm losing it today... i need a vacation) try not putting any shell interpreter in the first line or if you do try using

#!/bin/bash

Also ... do you get any error messeges in your code.. also putting this in cron might not be the best way to launch it.... i would put it in your startup scripts when the system starts. Then you don't need to worry about cron

once again.. sorry for all the posts... it's just been a really rough couple of days for me

Re: FileSystemAlert Script

Kyle D. Harris — Mon, 14 Jul 2003 13:46:04 GMT

John, No problem about the messages. Good luck with the car.

To all, i'll try suggestions from your posts in a minute. I wasn't getting any errors, it just wasn't running. I believe one of you said the way i had the script it would create an endless script every hour, which i believe it was when i looked at my processes! I'll respond back in a few. Thanks!

Re: FileSystemAlert Script

John Meissner — Mon, 14 Jul 2003 13:55:15 GMT

Kyle - yes... this script, as is, if entered into a cron job would start an endless script every time you ran it....

to change that either 1 of 2 things can be done.

1 - enter it into your start up scripts on your box
2 - remove the folloing lines:
mark=1
while [ $mark = 1 ]
do
#and also
sleep 100 #or whatever time
else
sleep 100 #or whatever time
#and also
done #which is the last line which closes the while [$mark = 1 ] line

Re: FileSystemAlert Script

Caesar_3 — Mon, 14 Jul 2003 18:49:46 GMT

Hello!

You can start the script as he if you will
start it in the boot by adding link to him
to the runlevel that you work in.

ln -s <script path> /sbin/rcX.d/S998diskcheck

Caesar

Re: FileSystemAlert Script

Caesar_3 — Mon, 14 Jul 2003 18:50:43 GMT

Hello!

You can start the script as he if you will
start it in the boot by adding link to him
to the runlevel that you work in.

ln -s <script path>
/etc/rc.d/rcX.d/S998diskcheck

Caesar