CentOS - Sep 2005 - Recommendation On Ping And Alert Tool

A bit off topic, but I keep looking for an answer to this question and
coming up with nothing... so I thought I would go to the gurus. :-)
 Can anyone recommend a good package for pinging other devices and sending
an email/alert when they go down? I'm aware of all kinds of more complex
things with GUIs and a zillion other bells and whistles we aren't looking
for, but we just want a simple tool (could be daemon or something run from
cron) that runs every 1 - 5 minutes and alerts us when stuff disappears.
Would need some basic logic like only sending one email/alert when something
goes down (vs sending an email every 1-5 minutes until it comes back up).
:-) We need to avoid a requirement for an X-windows GUI, but a web-GUI would
probably be fine (a GUI-less command-line thing would probably be best).
 TIA,
KC
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Nagios?

Kennedy Clark wrote:
> A bit off topic, but I keep looking for an answer to this question and
> coming up with nothing... so I thought I would go to the gurus. :-)
>  Can anyone recommend a good package for pinging other devices and sending
> an email/alert when they go down? I'm aware of all kinds of more
complex
> things with GUIs and a zillion other bells and whistles we aren't
looking
> for, but we just want a simple tool (could be daemon or something run from
> cron) that runs every 1 - 5 minutes and alerts us when stuff disappears.
> Would need some basic logic like only sending one email/alert when
something
> goes down (vs sending an email every 1-5 minutes until it comes back up).
> :-) We need to avoid a requirement for an X-windows GUI, but a web-GUI
would
> probably be fine (a GUI-less command-line thing would probably be best).
>  TIA,
> KC

I recommend monit (http://www.tildeslash.com/monit).  It is very easy to
set up and it works great.  You can grab the RPM from Dag's repository.

Marko



On Thu, September 22, 2005 10:54 am, Kennedy Clark said:
> A bit off topic, but I keep looking for an answer to this question and
> coming up with nothing... so I thought I would go to the gurus. :-)
>  Can anyone recommend a good package for pinging other devices and sending
> an email/alert when they go down? I'm aware of all kinds of more
complex
> things with GUIs and a zillion other bells and whistles we aren't
looking
> for, but we just want a simple tool (could be daemon or something run from
> cron) that runs every 1 - 5 minutes and alerts us when stuff disappears.
> Would need some basic logic like only sending one email/alert when
> something
> goes down (vs sending an email every 1-5 minutes until it comes back up).
> :-) We need to avoid a requirement for an X-windows GUI, but a web-GUI
> would
> probably be fine (a GUI-less command-line thing would probably be best).
>  TIA,
> KC
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>

On Thu, 2005-09-22 at 13:54 -0400, Kennedy Clark wrote:
> A bit off topic, but I keep looking for an answer to this question and
> coming up with nothing... so I thought I would go to the gurus. :-)
>  
> Can anyone recommend a good package for pinging other devices and
> sending an email/alert when they go down?  I'm aware of all kinds of
> more complex things with GUIs and a zillion other bells and whistles
> we aren't looking for, but we just want a simple tool (could be daemon
> or something run from cron) that runs every 1 - 5 minutes and alerts
> us when stuff disappears.  Would need some basic logic like only
> sending one email/alert when something goes down (vs sending an email
> every 1-5 minutes until it comes back up). :-)  We need to avoid a
> requirement for an X-windows GUI, but a web-GUI would probably be fine
> (a GUI-less command-line thing would probably be best).
----
the all purpose server tool - webmin

www.webmin.com

Craig


-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

On Thu, 2005-09-22 at 12:54, Kennedy Clark wrote:
> A bit off topic, but I keep looking for an answer to this question and
> coming up with nothing... so I thought I would go to the gurus. :-)
>  
> Can anyone recommend a good package for pinging other devices and
> sending an email/alert when they go down?  I'm aware of all kinds of
> more complex things with GUIs and a zillion other bells and whistles
> we aren't looking for, but we just want a simple tool (could be daemon
> or something run from cron) that runs every 1 - 5 minutes and alerts
> us when stuff disappears.  Would need some basic logic like only
> sending one email/alert when something goes down (vs sending an email
> every 1-5 minutes until it comes back up). :-)  We need to avoid a
> requirement for an X-windows GUI, but a web-GUI would probably be fine
> (a GUI-less command-line thing would probably be best).
This probably isn't the best anymore, but I've had it running with
no particular problems for 5 or 6 years - before any of the others
like it were available.  It is all-perl, has one server process to
collate the responses and rate-limit the alarms, one network probe
for all the remotely checks, and optional local clients for some
things that can only be tested locally. It is fairly easy to add
custom tests for local applications.
  http://spong.sourceforge.net/

-- 
  Les Mikesell
    lesmikesell at gmail.com

I previously used Nagios and because of the painful configurations, I found
OpenNMS.  It does all I need and more, being more easier than Nagios.  It
uses PostgreSQL and runs on top of Tomcat4.

Here is how I installed OpenNMS and it's prereqs.  It's rough, but it
works.

Installing Java and Tomcat
--------------

Download SDK and JRE to Local PC. Use SCP to copy them to the server in the
/downloads directory

mkdir /usr/local/java

cp /downloads/j2sdk-1_4_2_09-linux-i586.bin /usr/local/java

cp /downloads/j2re-1_4_2_09-linux-i586.bin /usr/local/java

cd /usr/local/java

chmod +x *

./j2sdk-1_4_2_09-linux-i586.bin

./j2re-1_4_2_09-linux-i586.bin

rm -rf *.bin

chown -R root:root j2sdk1.4.2_09

chown -R root:root j2re1.4.2_09

ln -s j2sdk1.4.2_09 j2sdk

ln -s j2re1.4.2_09 j2jre

nano -w /etc/profile

if ! echo ${PATH} | grep -q /usr/local/java/j2sdk/bin ; then
export PATH=/usr/local/java/j2sdk/bin:${PATH}
fi
if ! echo ${PATH} | grep -q /usr/local/java/j2re/bin ; then
export PATH=/usr/java/local/j2re/bin:${PATH}
fi
export JAVA_HOME=/usr/local/java/j2sdk
export
CLASSPATH=.:/usr/local/java/j2sdk/lib/tools.jar:/usr/local/java/j2re/lib/rt.
jar

exit

su -

java -version

java version "1.4.2_09"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_09-b05)
Java HotSpot(TM) Client VM (build 1.4.2_09-b05, mixed mode)


cd /downloads

groupadd -g 220 tomcat

useradd -u 220 -g tomcat -c "Tomcat" -r -d /usr/local/tomcat -s
"/sbin/nologin" tomcat

wget
http://mirrors.isc.org/pub/apache/jakarta/tomcat-4/v4.1.31/bin/jakarta-tomca
t-4.1.31.tar.gz

cp jakarta-tomcat-4.1.31.tar.gz /usr/local

cd /usr/local

tar -zxvf jakarta-tomcat-4.1.31.tar.gz

rm *.gz

chown -R tomcat:tomcat /usr/local/jakarta-tomcat-4.1.31

ln -s jakarta-tomcat-4.1.31 tomcat

nano -w /etc/sysconfig/iptables

Add port 8080 to ip tables

service iptables restart

nano -w /etc/profile

Add: CATALINA_HOME=/usr/local/tomcat

echo $CATALINA_HOME

nano -w /etc/rc.d/init.d/tomcat

ADD CONTENT:

#!/bin/sh
#
# Startup script for the Jakarta Tomcat Java Servlets and JSP server
#
# chkconfig: - 85 15
# description: Jakarta Tomcat Java Servlets and JSP server
# processname: tomcat
# pidfile: /var/run/tomcat.pid
# config:

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0# Set Tomcat environment.
export JAVA_HOME=/usr/local/java/j2sdk
export
CLASSPATH=.:/usr/local/java/j2sdk/lib/tools.jar:/usr/local/java/j2re/lib/rt.
jar
export CATALINA_HOME=/usr/local/tomcat
export CATALINA_OPTS="-Dbuild.compiler.emacs=true"
export PATH=/usr/local/java/j2sdk/bin:/usr/local/local/j2re/bin:$PATH

[ -f /usr/local/tomcat/bin/startup.sh ] || exit 0
[ -f /usr/local/tomcat/bin/shutdown.sh ] || exit 0

export PATH=$PATH:/usr/bin:/usr/local/bin

# See how we were called.
case "$1" in
start)
# Start daemon.
echo -n "Starting Tomcat: "
/usr/local/tomcat/bin/startup.sh
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch /var/lock/subsys/tomcat
;;
stop)
# Stop daemons.
echo -n "Shutting down Tomcat: "
/usr/local/tomcat/bin/shutdown.sh
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f /var/lock/subsys/tomcat
;;
restart)
$0 stop
$0 start
;;
condrestart)
[ -e /var/lock/subsys/tomcat ] && $0 restart
;;
status)
status tomcat
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
esac

exit 0


 

chown root:root /etc/rc.d/init.d/tomcat

chmod 755 /etc/rc.d/init.d/tomcat

chkconfig --add tomcat

chkconfig tomcat on

Go to: http://localhost:8080

Note: It will take about 15 seconds to pull up.

 

--------------

Installing RRDTool

yum install rrdtool

 
--------------

Configuring SNMP

yum -y install net-snmp-utils

cd /etc/snmp

mv snmpd.conf snmpd.conf.old

nano -w snmpd.conf

Add: rocommunity <password>

chkconfig snmpd on

service snmpd start

snmpwalk -v 1 -c <password> localhost system


--------------

Configuring Postgresql

service postgresql start

chkconfig postgresql on

nano -w /var/lib/pgsql/data/postgresql.conf

add/change: tcpip_socket = true

add/change: shared_buffers = 1024

nano -w /var/lib/pgsql/data/pg_hba.conf

change (remove comment): host all all 127.0.0.1 255.255.255.255 trust

change: local all all trust

service postgresql restart

--------------

Configuring OpenNMS

cd /downloads

wget
http://easynews.dl.sourceforge.net/sourceforge/opennms/opennms-1.2.4-1_cento
s4.i386.rpm

wget
http://easynews.dl.sourceforge.net/sourceforge/opennms/opennms-docs-1.2.4-1_
centos4.i386.rpm

wget
http://easynews.dl.sourceforge.net/sourceforge/opennms/opennms-webapp-1.2.4-
1_centos4.i386.rpm

rpm -i opennms-1.2.4-1_centos4.i386.rpm --nodeps

rpm -i opennms-docs-1.2.4-1_centos4.i386.rpm --nodeps

rpm -i opennms-webapp-1.2.4-1_centos4.i386.rpm --nodeps

cd /opt/OpenNMS/bin

./runjava -s

./install -disU

./install -y -w $CATALINA_HOME/webapps -W $CATALINA_HOME/server/lib

cd /opt/OpenNMS/etc

nano -w discovery-configuration.xml

Change the begin and end IP address to 127.0.0.1, or 

service tomcat restart

/opt/OpenNMS/bin/opennms.sh start

chkconfig opennms on

opennms -v status

Goto: http://localhost:8080/opennms/

login with admin:admin

Change password

 




>On Thu, 2005-09-22 at 12:54, Kennedy Clark wrote:
>  
>
>>A bit off topic, but I keep looking for an answer to this question and
>>coming up with nothing... so I thought I would go to the gurus. :-)
>> 
>>Can anyone recommend a good package for pinging other devices and
>>sending an email/alert when they go down?  I'm aware of all kinds of
>>more complex things with GUIs and a zillion other bells and whistles
>>we aren't looking for, but we just want a simple tool (could be
daemon
>>or something run from cron) that runs every 1 - 5 minutes and alerts
>>us when stuff disappears.  Would need some basic logic like only
>>sending one email/alert when something goes down (vs sending an email
>>every 1-5 minutes until it comes back up). :-)  We need to avoid a
>>requirement for an X-windows GUI, but a web-GUI would probably be fine
>>(a GUI-less command-line thing would probably be best).
>>    
>>
>
>This probably isn't the best anymore, but I've had it running with
>no particular problems for 5 or 6 years - before any of the others
>like it were available.  It is all-perl, has one server process to
>collate the responses and rate-limit the alarms, one network probe
>for all the remotely checks, and optional local clients for some
>things that can only be tested locally. It is fairly easy to add
>custom tests for local applications.
>  http://spong.sourceforge.net/
>
>  
>

_______________________________________________
CentOS mailing list
CentOS at centos.org
http://lists.centos.org/mailman/listinfo/centos
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On Thu, 2005-09-22 at 14:21, Todd Reed wrote:
> I previously used Nagios and because of the painful configurations, I found
> OpenNMS.  It does all I need and more, being more easier than Nagios.  It
> uses PostgreSQL and runs on top of Tomcat4.
Do any of these alternatives combine the ability to monitor current
status with a grid-like display of many systems and services with
notification alarms and also keep long-term historical graphs of
values?   I'm currently running spong for notifications/status and
cacti for history/graphs, but I'd like to find something that does
both with one snmp query.

-- 
  Les Mikesell
    lesmikesell at gmail.com

Try OpenNMS.  Nagios and Zabbix can also do historical data, although I'm
not sure about SNMP.  I've tried using both and by dar, I feel that OpenNMS
is easier to work with.  The installation of Tomcat and Java is the hardest
item.  I do know that OpenNMS can do SNMP.  Pretty much, I give OpenNMS the
IP address and it finds the common services.  You may have to go in and
define custom services (I had to since my Oracle servers have multiple
listener ports).  It will try the default SNMP string, but if you change it,
there is a web form to change it.  You can also enter your asset information
through the web form.

You can also create custom reports that can be called on the fly.

Check out http://www.opennms.org for the screen shots and more information.


I've been working with it for about 2 weeks and already I'm able to do
more
with it than Nagios or Zabbix.  The only thing I liked about Nagios is the
WRML graph, but I mainly want to see a status grid and that's it.

--Todd


-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
Behalf
Of Les Mikesell
Sent: Thursday, September 22, 2005 2:29 PM
To: CentOS mailing list
Subject: RE: [CentOS] Recommendation On Ping And Alert Tool

On Thu, 2005-09-22 at 14:21, Todd Reed wrote:
> I previously used Nagios and because of the painful configurations, I
found
> OpenNMS.  It does all I need and more, being more easier than Nagios.  It
> uses PostgreSQL and runs on top of Tomcat4.
Do any of these alternatives combine the ability to monitor current
status with a grid-like display of many systems and services with
notification alarms and also keep long-term historical graphs of
values?   I'm currently running spong for notifications/status and
cacti for history/graphs, but I'd like to find something that does
both with one snmp query.

-- 
  Les Mikesell
    lesmikesell at gmail.com


_______________________________________________
CentOS mailing list
CentOS at centos.org
http://lists.centos.org/mailman/listinfo/centos
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Kennedy Clark wrote:
> A bit off topic, but I keep looking for an answer to this question and 
> coming up with nothing... so I thought I would go to the gurus. :-)
>  
> Can anyone recommend a good package for pinging other devices and 
> sending an email/alert when they go down?  I'm aware of all kinds of 
> more complex things with GUIs and a zillion other bells and whistles we 
> aren't looking for, but we just want a simple tool (could be daemon or 
> something run from cron) that runs every 1 - 5 minutes and alerts us 
> when stuff disappears.  Would need some basic logic like only sending 
> one email/alert when something goes down (vs sending an email every 1-5 
> minutes until it comes back up). :-)  We need to avoid a requirement for 
> an X-windows GUI, but a web-GUI would probably be fine (a GUI-less 
> command-line thing would probably be best).
Bash. Here is what I use for monitoring my website

#!/bin/bash

URL="http://www.911networks.com"
EMAIL="artsi at fartsi.com"

lynx -dump "$URL" > /dev/null
if [ $? -ne 0 ]; then
     echo "`date "+%F %T"` - $URL is down" | mail -s
"$URL is
down" $EMAIL
fi

Watch for the wraps and make it executable [chmod 7xx]


-- 
Thanks
http://www.911networks.com
When the network has to work Cisco/Microsoft

From: Kennedy Clark [mailto:hkclark at gmail.com]
> 
> Great thread.  Thanks to all for their input!   
> 
> Bryan asks a good question about whether we are looking for a 
> full SNMP tool.  Actually, we have some pretty big systems 
> that already handle those functions.  For this project, we 
> are just looking for ping-type "is it up or down" information 
> on a "subset of the overall network."
> 
> It looks like Jacob's recommendation for Mon could be spot 
> on.  But, that being said, OpenNMS and Zabbix look pretty 
> cool and worth a look (possibly for other projects with more 
> complex needs).  Re a script, I was going to do something 
> like that if I couldn't get anything here :-)  but I was 
> trying to avoid having to add in the "don't send and email 
> every time it checks during a prolonged outage" (just send at 
> the beginning and maybe the end).
I'll second the recommendation of Mon.  It is simple and powerful with
very few requirements.  Mon.cgi will give you web-based access to the
status information.  It also has the advantage of being written in
Perl, so making minor changes to the monitoring or alerting routines
is very easy.  The logic to only notify once (or twice, or three
times) per outage is built-in.  You can also change the notification
routines based on the time of day and/or day of the week.  For
instance, I set mine so that it doesn't bother notifying me about
scheduled daily reboots of some of the servers.

Bowie

On 9/22/05, Kennedy Clark <hkclark at gmail.com>
wrote:
> A bit off topic, but I keep looking for an answer to this question and
> coming up with nothing... so I thought I would go to the gurus. :-)
>
> Can anyone recommend a good package for pinging other devices and sending
an
> email/alert when they go down?  I'm aware of all kinds of more complex
> things with GUIs and a zillion other bells and whistles we aren't
looking
> for, but we just want a simple tool (could be daemon or something run from
> cron) that runs every 1 - 5 minutes and alerts us when stuff disappears.
> Would need some basic logic like only sending one email/alert when
something
> goes down (vs sending an email every 1-5 minutes until it comes back up).
> :-)  We need to avoid a requirement for an X-windows GUI, but a web-GUI
> would probably be fine (a GUI-less command-line thing would probably be
> best).
I don't know about best, but we're using Big Sister
(http://www.bigsister.ch/) - web based.

--
Collins Richey
      Debugging is twice as hard as writing the code ... If you write
      the code as cleverly as possible, you are, by definition, not
      smart enough to debug it.
             -Brian Kernighan

Try the following .. It rocks ..

JFFNMS
 	
http://jffnms.sourceforge.net


Very powerful tool ..

BRW

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
Behalf
Of Todd Reed
Sent: Thursday, September 22, 2005 12:38 PM
To: CentOS mailing list
Subject: RE: [CentOS] Recommendation On Ping And Alert Tool

Try OpenNMS.  Nagios and Zabbix can also do historical data, although I'm
not sure about SNMP.  I've tried using both and by dar, I feel that OpenNMS
is easier to work with.  The installation of Tomcat and Java is the hardest
item.  I do know that OpenNMS can do SNMP.  Pretty much, I give OpenNMS the
IP address and it finds the common services.  You may have to go in and
define custom services (I had to since my Oracle servers have multiple
listener ports).  It will try the default SNMP string, but if you change it,
there is a web form to change it.  You can also enter your asset information
through the web form.

You can also create custom reports that can be called on the fly.

Check out http://www.opennms.org for the screen shots and more information.


I've been working with it for about 2 weeks and already I'm able to do
more
with it than Nagios or Zabbix.  The only thing I liked about Nagios is the
WRML graph, but I mainly want to see a status grid and that's it.

--Todd


-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
Behalf
Of Les Mikesell
Sent: Thursday, September 22, 2005 2:29 PM
To: CentOS mailing list
Subject: RE: [CentOS] Recommendation On Ping And Alert Tool

On Thu, 2005-09-22 at 14:21, Todd Reed wrote:
> I previously used Nagios and because of the painful configurations, I
found
> OpenNMS.  It does all I need and more, being more easier than Nagios.  
> It uses PostgreSQL and runs on top of Tomcat4.
Do any of these alternatives combine the ability to monitor current status
with a grid-like display of many systems and services with notification
alarms and also keep long-term historical graphs of
values?   I'm currently running spong for notifications/status and
cacti for history/graphs, but I'd like to find something that does both with
one snmp query.

--
  Les Mikesell
    lesmikesell at gmail.com


_______________________________________________
CentOS mailing list
CentOS at centos.org
http://lists.centos.org/mailman/listinfo/centos

Just wanted to add one more tool to make this threat complete.

See Opmanager at

http://manageengine.adventnet.com/products/opmanager/ 

The free edition is really nice if you have a small network to monitor.

Nassri
> 
> Try the following .. It rocks ..
> 
> JFFNMS
>  	
> http://jffnms.sourceforge.net
> 
> 
> Very powerful tool ..
> 
> BRW
> 
> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Todd Reed
> Sent: Thursday, September 22, 2005 12:38 PM
> To: CentOS mailing list
> Subject: RE: [CentOS] Recommendation On Ping And Alert Tool
> 
> Try OpenNMS.  Nagios and Zabbix can also do historical data, 
> although I'm not sure about SNMP.  I've tried using both and 
> by dar, I feel that OpenNMS is easier to work with.  The 
> installation of Tomcat and Java is the hardest item.  I do 
> know that OpenNMS can do SNMP.  Pretty much, I give OpenNMS 
> the IP address and it finds the common services.  You may 
> have to go in and define custom services (I had to since my 
> Oracle servers have multiple listener ports).  It will try 
> the default SNMP string, but if you change it, there is a web 
> form to change it.  You can also enter your asset information 
> through the web form.
> 
> You can also create custom reports that can be called on the fly.
> 
> Check out http://www.opennms.org for the screen shots and 
> more information.
> 
> 
> I've been working with it for about 2 weeks and already I'm 
> able to do more with it than Nagios or Zabbix.  The only 
> thing I liked about Nagios is the WRML graph, but I mainly 
> want to see a status grid and that's it.
> 
> --Todd
> 
> 
> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Les Mikesell
> Sent: Thursday, September 22, 2005 2:29 PM
> To: CentOS mailing list
> Subject: RE: [CentOS] Recommendation On Ping And Alert Tool
> 
> On Thu, 2005-09-22 at 14:21, Todd Reed wrote:
> > I previously used Nagios and because of the painful 
> configurations, I
> found
> > OpenNMS.  It does all I need and more, being more easier 
> than Nagios.  
> > It uses PostgreSQL and runs on top of Tomcat4.
> 
> Do any of these alternatives combine the ability to monitor 
> current status with a grid-like display of many systems and 
> services with notification alarms and also keep long-term 
> historical graphs of
> values?   I'm currently running spong for notifications/status and
> cacti for history/graphs, but I'd like to find something that 
> does both with one snmp query.
> 
> --
>   Les Mikesell
>     lesmikesell at gmail.com
> 
> 
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
> 
> 
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>

Are there recommendations for trimming quotes on this list?

Brian Brunner
brian.t.brunner at gai-tronics.com
(610)796-5838
>>> wam at HiWAAY.net 09/23/05 08:07AM >>>
Steven Vishoot wrote:
>--- "William A. Mahaffey III" <wam at HiWAAY.net> wrote:
>
>  
>
>>CentOS mailing list wrote:
>>
>>    
>>
>>>Kennedy Clark wrote:
>>>
>>>      
>>>
>>>>A bit off topic, but I keep looking for an answer
>>>>        
>>>>
>>to this question 
>>    
>>
>>>>and coming up with nothing... so I thought I
>>>>        
>>>>
>>would go to the gurus. :-)
>>    
>>
>>>> 
>>>>Can anyone recommend a good package for pinging
>>>>        
>>>>
>>other devices and 
>>    
>>
>>>>sending an email/alert when they go down?  I'm
>>>>        
>>>>
>>aware of all kinds of 
>>    
>>
>>>>more complex things with GUIs and a zillion other
>>>>        
>>>>
>>bells and whistles 
>>    
>>
>>>>we aren't looking for, but we just want a simple
>>>>        
>>>>
>>tool (could be 
>>    
>>
>>>>daemon or something run from cron) that runs
>>>>        
>>>>
>>every 1 - 5 minutes and 
>>    
>>
>>>>alerts us when stuff disappears.  Would need some
>>>>        
>>>>
>>basic logic like 
>>    
>>
>>>>only sending one email/alert when something goes
>>>>        
>>>>
>>down (vs sending an 
>>    
>>
>>>>email every 1-5 minutes until it comes back up).
>>>>        
>>>>
>>:-)  We need to 
>>    
>>
>>>>avoid a requirement for an X-windows GUI, but a
>>>>        
>>>>
>>web-GUI would 
>>    
>>
>>>>probably be fine (a GUI-less command-line thing
>>>>        
>>>>
>>would probably be best).
>>    
>>
>>>Bash. Here is what I use for monitoring my website
>>>
>>>#!/bin/bash
>>>
>>>URL="http://www.911networks.com"
>>>EMAIL="artsi at fartsi.com"
>>>
>>>lynx -dump "$URL" > /dev/null
>>>if [ $? -ne 0 ]; then
>>>    echo "`date "+%F %T"` - $URL is down" | mail
>>>      
>>>
>>-s "$URL is down" $EMAIL
>>    
>>
>>>fi
>>>
>>>Watch for the wraps and make it executable [chmod
>>>      
>>>
>>7xx]
>>    
>>
>>>      
>>>
>>This is the sort of thing I was going to suggest.
>>You could go 1 better 
>>& have it resubmit itself periodically w/ at(1).
>>Maybe get it to do some 
>>argument parsing so you could pass in the URL,
>>EMAIL, then invoke plural 
>>instances for however many things you want to
>>monitor ....
>>
>>-- 
>>	William A. Mahaffey III
>>
>>    
>>
>---------------------------------------------------------------------
>  
>
>>	Remember, ignorance is bliss, but
>>	willful ignorance is LIBERALISM !!!!
>>
>>_______________________________________________
>>CentOS mailing list
>>CentOS at centos.org 
>>http://lists.centos.org/mailman/listinfo/centos 
>>
>>    
>>
>
>My question is wouldnt this keep on sending emails all
>the time ping keeps on seeing it is down. I thought
>one of the requirements was once for each occurance? I
>probably am reading this wrong...
>
>Steven
> 
>
>"On the side of the software box, in the 'System Requirements'
section, it said 'Requires Windows or better'. So I installed
Linux."
>_______________________________________________
>
>  
>
It wouldn't have to. You would probably structure the script to E-mail 
if the device was down & then exit. It would re-submit itself if the 
device were up :-).

-- 
	William A. Mahaffey III
---------------------------------------------------------------------
	Remember, ignorance is bliss, but
	willful ignorance is LIBERALISM !!!!


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