Help on Script

srikanthrao_d · 03-08-2006, 11:18 PM

Hi All,

I am using one script where it will ping to servers and if any thing is down it will send mail, I used mail but mail I can not mention from address so I used sendmail. In sendmail I can not mention the subject, please help me how to mention the subject in the sendmail. I am posting script also.

Thanks,
Srikanth

==========script=============

[root@ss-mail ~]# cat ping
#!/bin/bash
#This script pings all the servers\
hosts=/root/hostfiles
for str in `cat $hosts`
do
ping -c 1 $str >> output_file 2>&1
if [ $? -eq 0 ]
then
echo $str is up
else
echo $str is down | /usr/sbin/sendmail -r 'sysadmin@mm.com' 'sysadmin@mm.com'
fi
done
rm -f output_file
====================

bathory · 03-09-2006, 02:12 AM

Quote:

echo $str is down | /usr/sbin/sendmail -r 'sysadmin@mm.com' 'sysadmin@mm.com'

mail works just fine usnig this:

Code:

echo $str is down | /usr/bin/mail -s 'Down' -r 'sysadmin@mm.com' 'sysadmin@mm.com'

srikanthrao_d · 03-09-2006, 02:25 AM

Hello ,

Thanks for the post.

I tried with -r option, it is saying invalid option

Thanks,
Srikanth

srikanthrao_d · 03-09-2006, 02:28 AM

I tried with removing -r option, but i did not get from address.here i need from address and subject also very important.

Thanks,
Srikanth

bathory · 03-09-2006, 02:48 AM

It should work!!
Run

Code:

ls -l /usr/bin/mail

to see if it's a symlink to mutt or something, because mutt does not have the -r option. You can use mailx or nail (which is the actual mail or mailx command in Slackware for example) to see if it helps.

srikanthrao_d · 03-09-2006, 02:56 AM

Hello Sir,

I did not find mail on /usr/bin/. I do not find other mutt also
===========================
[root@hyd-backup ~]# ls -l /usr/bin/ma
mac2unix mail-files makecode make_wagon_desc
macbinary mail.local makedb makewhatis
macptopbm mailq make_driver_db_cups man
macsave mailq.exim make_driver_db_lpr man2html
macstream mailq.postfix make_encmap manpath
macunpack mailq.sendmail makeindex manweb
macusers mailsettings makeinfo mapscrn
mag mailshar makekdewidgets matchpathcon
magicdev mailstat makemap mattrib
magicfilter-t mailutil makempx
magnifier mailutime makempy
mahjongg make makeobj
=============================================

i am using FC3 here. Please help me to proceed further

Thanks

JZL240I-U · 03-09-2006, 02:59 AM

Why don't you try "locate mail" to see where what resides? I notice that your /usr/bin doesn't contains neither mail nor mutt...

srikanthrao_d · 03-09-2006, 03:10 AM

I found mail in /bin/mail

but when i did not see mut there i can see only mail there

when i excute with it is giving this error

[root@ss ~]# ./ping
10.191.40.254 is up
10.191.40.253 is up
10.191.40.252 is up
10.0.1.21 is up
10.0.1.22 is up
10.0.1.32 is up
10.91.0.254 is up
10.91.0.253 is up
10.91.0.252 is up
10.91.0.249 is up
/bin/mail: invalid option -- r
Usage: mail [-iInv] [-s subject] [-c cc-addr] [-b bcc-addr] to-addr ...
[- sendmail-options ...]
mail [-iInNv] -f [name]
mail [-iInNv] [-u user]
===========

locate results

[root@ss ~]# ls -l /bin/m
mail mkdir mknod mktemp more mount mt mv
[root@ss ~]# ls -l /bin/m

Thanks,
Srikanth

doc.nice · 03-09-2006, 03:14 AM

man mail is your friend...
using -a you can add an "From:"-Header. this of course doesn't send your messsage
from this account, but shows this as the sender. Use "Reply-To:" for fixing the
answer-function...

Code:

#!/bin/bash

###
### This script pings all the servers
### in the file defined in $outfile
### and sends mail if at least one
### host does not respond.
###
### written by Florian Harbich (doc.nice on linuxquestions.org,
### based on code from linuxquestions.org
### user srikanthrao_d
### in thread 423027 ("Help on script")
### no rights reserved.
### Use it as you like
###

# file with hosts to ping (one per line)
hosts='/root/hostfiles'

# temporary ping output
outfile='/tmp/output_file'

downhosts=''

if [ ! -r $hosts ]; then
  echo "Hosts list ($hosts) ist not readable! command aborted." >&2
  exit 1
fi

for hname in `cat $hosts`; do
  ping -c 1 $hname >> $outfile 2>&1
  if [ $? -eq 0 ]; then
    echo "$hname is up"
  else
    echo "$hname is down" >&2
    downhosts="$downhosts, $hname"
  fi
done

if [ "$downhosts" ]; then
  mail -s 'System down' -a 'From: sysadmin@mm.com' -a 'Reply-To: sysadmin@mm.com' 'sysadmin@mm.com' <<-EOF
    The System $str does not respond to ping probes.

    Please check online status.

    Ping log follows:
    --SNIP--
    $(cat $outfile)
    --SNAP--

    -- 
    This message was automatically generated by the ping script
    at $(date) on $(hostname)
  EOF
fi
rm -f $outfile >/dev/null 2>&1

Hope this helps...
Florian

srikanthrao_d · 03-09-2006, 03:59 AM

Hi

Thanks a lot for your help

i do not have that much idea on script when i am trying to excute your given script i am getting some error. Please let me know what are the changes i need to do

thanks
srikanth

Errors

=========

./man: line 41: unexpected EOF while looking for matching `"'
./man: line 58: syntax error: unexpected end of file

sseetharaman · 03-09-2006, 04:30 AM

Hi Srikanth,

You can create file with entries like

Subject: Ping Problem
Some content here

and feed input for sendmail

sendmail -r 'sysadmin@mm.com' 'sysadmin@mm.com' < <file_name_u_create>

thx
sseetharaman

Quote:

Originally Posted by srikanthrao_d

Hi All,

I am using one script where it will ping to servers and if any thing is down it will send mail, I used mail but mail I can not mention from address so I used sendmail. In sendmail I can not mention the subject, please help me how to mention the subject in the sendmail. I am posting script also.

Thanks,
Srikanth

==========script=============

[root@ss-mail ~]# cat ping
#!/bin/bash
#This script pings all the servers\
hosts=/root/hostfiles
for str in `cat $hosts`
do
ping -c 1 $str >> output_file 2>&1
if [ $? -eq 0 ]
then
echo $str is up
else
echo $str is down | /usr/sbin/sendmail -r 'sysadmin@mm.com' 'sysadmin@mm.com'
fi
done
rm -f output_file
====================

doc.nice · 03-09-2006, 04:43 AM

fixed my script above... (wrong quoting char in line 41)