script

[ivy1234]

we have a server that always have problem ( we still can't find the reason ) and hang , we want to have a script ( run on another server ) to test the server is running or not , we want to run telnet to access this server , if the login prompt retun ( that mean the server is still active ) , then do nothing , if no login prompt return , do send mail to alert me , can advise how to write this script ?

Thanks.

[Torsten.]

If you have a proliant with windows running, then install "UDN", this is probably exactly what you want (based on "ping").

[Dennis Handly]

>Torsten: this is probably exactly what you want (based on ping).

This may not be that useful. I've had plenty of cases where ping worked but the system was hung.

[Torsten.]

So a TOC and dump analyze would be the better way, maybe ...

[ivy1234]

Thanks ,

I perfer to use script to check it as , I may be use it in various unix-like server .

can advise what can i do ? thx

[Doug O'Leary]

Hey;

You can write up a script in perl/expect that'll do exactly what you're looking for; however, that'll be a one-off script. It does that and only that.

It sounds like your best bet would be to get and install nagios (http://www.nagios.org/ ). It's a free monitoring tool with web based reporting and customizable alerting (pages, text messages, emails, etc). Over and above telnet, it does monitoring on filesystem usage, cpu usage, memory usage, ssh, web, mail, database, etc, etc.

You can also write your own plugins and pretty much have it monitor anything you want. While a one-off script will do what you're asking for right here, you'll quickly find you want to monitor other things as well.

Don't reinvent the wheel if you don't have to.

Doug

[Steven Schweda]

> script

Is that the most descriptive subject which
you could devise?

> [...] various unix-like server .

Not a very detailed description of anything.

Did you try searching before asking? A Forum
search for keywords like, say,
telnet script
should have found some potentially useful old
threads, like, for example:

http://h30499.www3.hp.com/t5/System-Administration/telnet-xx-xx-xx-port-how-break-the-connection-in-script/m-p/5202982#M463743

However, a Telnet test might not be the
easiest or the most useful, depending on
exactly what "server is running" means to
you. For example, if the system under test
runs a Web server, then a program like wget
could be used to test its ability to serve a
Web page. Testing the actual function(s) of
interest may provide more useful information
than testing Telnet response can.