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Old 02-14-2008, 01:22 AM   #1
knewtolinux
LQ Newbie
 
Registered: Feb 2008
Posts: 6

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Help with Script and Cron Job to e-mail df - h


I need to create a cronjob which will check disk space an e-mail the result to me.

Could someone help me? I have been looking high and low and tried several different finds from Google but best I can get is a script to run but never e-mails me so assuming I have something wrong. Once successful then need to setup a daily cronjob to email df -h results.

I also man cronjob and still having problms. I thought I had this down but I'm wrong.

Any help is greatly appreciate.

I'm running:
Red Hat Enterprise Linux

Here's the closet I have that doesn't create errors but never send e-mail.


#!/bin/sh
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
echo $output
usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )
partition=$(echo $output | awk '{ print $2 }' )
if [ $usep -ge 1 ]; then
echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |
mail -s "Disk Check $usep%" me@me.com
fi
done
 
Old 02-14-2008, 02:24 AM   #2
chrism01
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Registered: Aug 2004
Location: Sydney
Distribution: Centos 6.8, Centos 5.10
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Try
set -xv
at the top of your script and run by hand. It'll show you what's really happening.
For one thing, $usep and $uesp% are 2 diff vars(!). Try ${usep}%
 
Old 02-14-2008, 02:32 AM   #3
yuiy88
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Registered: Feb 2007
Distribution: Fedora&Debian
Posts: 10

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Put the script at /etc/cron.daily/

Then, edit crontab
-> vi /etc/crontab
-> input MAILTO=root
-> save the file

Or

Create a file at /etc/cron.d/check-space
-> vi check-space
-> input the following
MAILTO=root
10 1 * * * root /etc/cron.daily/script
-> save the file

Try this...Hope can help
 
Old 02-14-2008, 02:54 AM   #4
knewtolinux
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Registered: Feb 2008
Posts: 6

Original Poster
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Looked quickly and have MailTo=root

Here's my crontab

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/

# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly
~
~
~
~
~
~
~
~
~
~
~
~
~
"/etc/crontab" 10L, 255C



Going to see what set -xv and chaging the var. Should I be looking at something with MTA/mail server as well?
 
Old 02-14-2008, 03:01 AM   #5
yuiy88
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Distribution: Fedora&Debian
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For your case, if you just want to know the disk space daily, i suggest installing logwatch would be helpful.

Logwatch provides server information daily to root.

Please make sure your server can send mail to yourself.
 
Old 02-14-2008, 03:03 AM   #6
knewtolinux
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Registered: Feb 2008
Posts: 6

Original Poster
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Here's the details ... Thanks all for helping me!
# ./df.sh
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
echo $output
usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )
partition=$(echo $output | awk '{ print $2 }' )
if [ $usep -ge 1 ]; then
echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |
mail -s "Disk Check $usep%" me@me.com
fi
done
+ df -H
+ grep -vE '^Filesystem|tmpfs|cdrom'
+ awk '{ print $5 " " $1 }'
+ read output
+ echo 60% /dev/sda3
60% /dev/sda3
echo $output | awk '{ print $1}' | cut -d'%' -f1
++ echo 60% /dev/sda3
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=60
echo $output | awk '{ print $2 }'
++ echo 60% /dev/sda3
++ awk '{ print $2 }'
+ partition=/dev/sda3
+ '[' 60 -ge 1 ']'
+ mail -s 'Disk Check 60%' me@me.com
hostname
++ hostname
date
++ date
+ echo 'Running out of space "/dev/sda3 (60%)" on me.net as on Thu Feb 14 02:55:59 EST 2008'
+ read output
+ echo 16% /dev/sda1
16% /dev/sda1
echo $output | awk '{ print $1}' | cut -d'%' -f1
++ echo 16% /dev/sda1
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=16
echo $output | awk '{ print $2 }'
++ echo 16% /dev/sda1
++ awk '{ print $2 }'
+ partition=/dev/sda1
+ '[' 16 -ge 1 ']'
+ mail -s 'Disk Check 16%' me@me.com
hostname
++ hostname
date
++ date
+ echo 'Running out of space "/dev/sda1 (16%)" on me.net as on Thu Feb 14 02:55:59 EST 2008'
+ read output
+ echo 100% /dev/sda5
100% /dev/sda5
echo $output | awk '{ print $1}' | cut -d'%' -f1
++ echo 100% /dev/sda5
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=100
echo $output | awk '{ print $2 }'
++ echo 100% /dev/sda5
++ awk '{ print $2 }'
+ partition=/dev/sda5
+ '[' 100 -ge 1 ']'
hostname
++ hostname
+ mail -s 'Disk Check 100%' me@me.com
date
++ date
+ echo 'Running out of space "/dev/sda5 (100%)" on me.net as on Thu Feb 14 02:55:59 EST 2008'
+ read output
+ echo 0% none
0% none
echo $output | awk '{ print $1}' | cut -d'%' -f1
++ echo 0% none
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=0
echo $output | awk '{ print $2 }'
++ echo 0% none
++ awk '{ print $2 }'
+ partition=none
+ '[' 0 -ge 1 ']'
+ read output
+ echo 7% /dev/sdb1
7% /dev/sdb1
echo $output | awk '{ print $1}' | cut -d'%' -f1
++ echo 7% /dev/sdb1
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=7
echo $output | awk '{ print $2 }'
++ echo 7% /dev/sdb1
++ awk '{ print $2 }'
+ partition=/dev/sdb1
+ '[' 7 -ge 1 ']'
hostname
++ hostname
date
++ date
+ echo 'Running out of space "/dev/sdb1 (7%)" on me.net as on Thu Feb 14 02:55:59 EST 2008'
+ mail -s 'Disk Check 7%' me@me.com
+ read output
 
Old 02-14-2008, 03:07 AM   #7
knewtolinux
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Registered: Feb 2008
Posts: 6

Original Poster
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How much is logwatch?

What would be the easiest way to see if the server can send mail to me.
 
Old 02-14-2008, 03:22 AM   #8
yuiy88
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Registered: Feb 2007
Distribution: Fedora&Debian
Posts: 10

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Logwatch is a free software tool in linux.

You can install it using the command below
-> yum install logwatch
 
Old 02-14-2008, 01:40 PM   #9
knewtolinux
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Registered: Feb 2008
Posts: 6

Original Poster
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When I run yum install logwatch it's not valid.

I tried I tried to run a simple test and watch the message...

I ran:

echo "testing" | mail -s "just a test" helpme@help.com





I see the following.....

Feb 14 09:29:45 server sendmail[21636]: m1EETjGj021636: to=helpme@help.com, ctladdr=root (0/0), delay=00:00:00,

xdelay=00:00:00, mailer=relay, pri=30054, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (m1EETjoS021638 Message

accepted for delivery)



Feb 14 09:30:45 server sendmail[21640]: m1EETjoS021638: to=<helpme@help.com>, ctladdr=<root@server.net> (0/0), delay=00:01:00, xdelay=00:01:00, mailer=esmtp, pri=30316, relay=help.com. [24.154.1.11], dsn=4.0.0, stat=Deferred: Connection timed out with help.com.
 
Old 02-14-2008, 07:48 PM   #10
knewtolinux
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Registered: Feb 2008
Posts: 6

Original Poster
Rep: Reputation: 0
Finally got it to work. Had to configure "Smart".

Thanks all!
 
  


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