Hi all,

I have a case were I need to monitor the same thing on many different servers at the same time.
Currently I'm opening multiple terminals and running the same ssh command for ever server. So, I thought it might be best to use AWK to use just one terminal.

Ok, so basically I need to display a certain line from the output of a command on my remote servers, and since it's application-specific, I'll refer to it here as the command df.
I need to watch the output, so I do:
What I need to do, is to watch the same output for many servers, at the same time in the same window, so that they will be shown below each other.

Does anyone know of any ideas to achieve this?

Have you considered using a terminal emulator like 'Terminator'?
Have you looked into screen? While the output would all be in one terminal (sorta) you wouldn't be able to see it all at once.
Have you thought about maybe just logging that output to a single file that's in some networked directory available to all hosts and then just tail -F that file?

Hello lydiaXr,

No, not really. I'm on a Mac and use Fedora otherwise, so terminals are everywhere around me.

Again, nope.

Yes. But that wouldn't serve the purpose.

You see, I need not to log the output(s) into a single file, that's easy no problem.
One of my daily tasks is to sit and watch the number of calls going through our VOIP switches, and I have to do this over multiple servers.
Now, if it was one server, then BAAM!, easy. One terminal; one SSH session would do the job.

The problem is that it's not just one server, it's more. And currently I have to open a terminal window for each SSH session.

What I'm looking for is to write a simple script (if needed), that would contain the necessary set of commands that would initiate multiple SSH sessions at the same time, and display them on one open terminal screen.

Please let me know if you can help in anyway.

Thanks..
//M

Ouch; I hope you are kidding..

Anyway a quick n dirty soln is to write a shell script that fires off the ssh cmds into the background via '&'.
By default, the stdout & stderr (of each process) are still attached to the initiating terminal session, so all output should appear on the term for you.

Surely you would be MUCH better off setting up something like NAGIOS to monitor the relevant parameters, that way you can at least have a usable display and configurable alerts.

Looks promising actually.
I'm not sure if it's going to give me what I need, but I'll definitely check it out in more details and put it to the test.

Will let you know if I need any further assistance.

Thanks..
//M

LoL... not bad if you own the switch itself ;-)

Yeah, tried that as well, but couldn't get the desired output :-(

You can address multiple server if you reverse the command order:You can also put an empty echo between the ssh commands to separate the output.

Thanks Reuti, never thought about it before. But tried it now and unfortunately it doesn't give the desired output/effect.
Basically it has to login every time it's going to execute a command, and all my servers have an email alert in their bashrc files.

I installed Nagios last night, but still having problems with how to run custom commands on remote servers.
@TenTenths, can you help with this please? I'd like to have Nagios display certain outputs, not just the normal temp, disk space etc.. stuff. Or at least point me into the right direction if possible.

Thanks all, your help is very much appreciated.

//M

Hi all,

This is to conclude my search with the following:

1- We wrote a script on the end servers that would be watched when logged in via SSH, so this is ok
2- We deployed Cacti (a wonderful graphing tool - awesome) for logging data and graphing them over time