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Shell Programming and Scripting

Bash Monitoring Alert Script

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# 8  
Old 06-22-2009
or
cat port_numbers.txt | sed 's/$/\n/g'
# 9  
Old 06-22-2009
Quote:
Originally Posted by research3
or
cat port_numbers.txt | sed 's/$/\n/g'
why exactly do you a cat there?
And btw:
Code:
$ echo '1 2 3 4' | sed 's/$/\n/g'
1 2 3 4n

# 10  
Old 06-22-2009
you can also try this:

HTML Code:
#!/bin/bash

#IFS='\n'

#set -x

port=80

for host in `cat host` 
do
	if  nc -zv -w1 $host $port 
	then
	echo "$host" up  
	else
	echo "$host" down	
	fi
done

cat host

test
Google
Yahoo!

---------- Post updated at 03:09 PM ---------- Previous update was at 03:07 PM ----------

sorry vgersh99 I mean:

HTML Code:
sed 's/ /\n/g'
Last edited by research3; 06-22-2009 at 08:22 PM..
# 11  
Old 06-23-2009
Thanks for everything. I finally got it working. Final solution is as follows:

Code:
#!/bin/sh
myHosts="host1.domain.com host2.domain.com host3.domain.com host4.domain.com"
myPorts=`cat /home/user/ping-script/port_numbers.txt`
for host in $myHosts
        do
                for port in $myPorts
                        do
                         if netcat -z $host $port
                         then
                                 echo port $host:$port is up
                         else
                                 date "+Server down - $host:$port -- %c"|mail -s "server down" test@domain.com
                          fi
                done
done

port_numbers.txt in it just has the port numbers all listed on a separate line.
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