Script to get the report of the process running in 30 Servers

[Kadavan]

Hi All

I need you valuable belp in creating a script that will login 30 servers and create a report of the process run by users other that root.

Regards
-Binu

[James R. Ferguson · Accepted solution]

Hi:

What have you tried?

I suggest using 'ssh -n ' for example to login to a list of servers and return information.

Something driven like:

while read HOST
do
ssh -n ${HOST} ps -ef
done < /home/binu/hostnames

Regards!

...JRF...

[Viktor Balogh]

Kadavan,

for this you will need at least the following:

- a file containing the name of the servers
- ssh keyed access (you don't want to type all the passwords per hand, do you?)

anyway, a while loop would do this, see above...

[Kadavan]

Hi Victor

Where can I mention the host file details in the the script

Regards
-Binu

[Viktor Balogh]

> Where can I mention the host file details in the the script


it is in the last line, where you specify that file. in our case it's /home/binu/hostnames :

#

while read HOST
do
ssh -n ${HOST} ps -ef
done < /home/binu/hostnames

#

[James R. Ferguson]

Hi (again):

> Where can I mention the host file details in the the script

The file that I showed in my example --- '/home/binu/hostnames' simply consists of a server's hostname, one name per line of the file.

Regards!

...JRF...

[Kadavan]

Hi Victor

Where will be the output of ps -ef get stored ..Is it possible to store the output of ps -ef of all servers in a single file.

Regards
-Binu

[Viktor Balogh]

> Where will be the output of ps -ef get stored ..Is it possible to store the output of ps -ef of all servers in a single file.

yes, use redirection:

while read HOST
do
ssh -n ${HOST} ps -ef
done < /home/binu/hostnames 1> /home/binu/output 2>&1

[Kadavan]

Thanks Viktor and James .The script is working .It is asking for password for each host ..Can we do some thih for this

and Is there way to arrange the output file according to the hostname

Regards
-Binu

[Mel Burslan]

Look at Victor's first answer.. You need authorized key pairs between the master and client servers.

If you don't know how to do this, I personally described this process at least in 10 different posts. Look at my answer history and find one of those. It is not hard but it needs precise execution for file ownerships and permissions.

Or search google for creating shh keys for passwordless login and you will find a tgon of documents explaining how to do this.

[Kadavan]

Thank you all your help ..I was able to do completed the script as foollows

while read HOST
do
ssh -n ${HOST} hostname
ssh -n ${HOST} ps aux | grep -v root

done < /home/binu/scripts/hostnames 1> /home/binu/scripts/output 2>&

Thanks
-Binu

[Steven Schweda]

> ssh -n ${HOST} hostname

What does that tell you that you didn't
already know?

[Kadavan]

This entry made to update the output file with hostname and then the Process details ..Other wise we cannot make out which process is from which server

Looks like this
cpaiqp4a

USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
tauser02 1396842 0.9 9.0 1385060 1385096 - A Mar 22 824:12 /opt/isv/WAS51
tauser02 3653858 0.4 9.0 1380776 1380812 - A Mar 22 350:33 /opt/isv/WAS51
www 4370646 0.1 2.0 283820 283588 - A Feb 28 243:21 /opt/isv/IBMIH
tauser02 4788304 0.0 1.0 136920 136956 - A Feb 28 55:44 /opt/isv/WAS51

[Steven Schweda]

> This entry made to update the output file
> with hostname [...]

Something simple (and local) might be faster:

echo ${HOST}

You're giving the name of the remote host to
"ssh", so that you can ask the remote host to
tell you its name? (I can imagine cases
where you might get a different answer back,
but none seems very likely.)

If you really want the name from the remote
host, do you need two "ssh" sessions?

> ssh -n ${HOST} ps aux | grep -v root

That does the "ps" on the other system, but
it does the "grep" locally, doesn't it? I
haven't tested it, but I'd try to do all the
work on the remote system:

ssh -n ${HOST} 'ps aux | grep -v root'

And, if that worked, then I'd try something
like:
[...] 'hostname ; ps aux | grep [...]'
in _one_ "ssh" command.