Shell Programming and Scripting

Hi,
I need to login to multiple servers(around 20) every day and get error messages from log file.The command i use to get this done is "$more /var/log/messages |grep error" and copy error messages.

I want this to be automated using a shell script and mail error messages to a given email id.

Can some one help me in creating a shell script?


Thanks in advance!

Cheers!
Sreedhar

You will have to setup rsh or ssh connectivity between the central server where you will be collecting the files. By connectivity, I mean that one user from your central server should be able to connect to the other servers without using a password.

Then you can use this:

Code:

for server in a b c d; do
   ssh some_user\@$server grep error /var/log/messages > $server.log.$(date +%Y%m%d)
done

The grep command will run on the remote server, while the log file should get created on your central system. You could run this from cron.

Thanks a lot for the reply.

SSH is already enabled..most of the cases username is the same for all the servers but the password differs.I cant make anychanges to the servers coz I am not the administrator of the server and we dont own them. Is there a way where i can store server IPs , username and Passwords and send them non-interactively?

Regards,
Sreedhar

You really should have key based authentication setup between the central server and the rest of the servers. You can use the fd filesystem to redirect input to ssh in Solaris, but it is not a portable method (has no parallel in HP-UX for instance).

Get in touch with the administrators and ask them to help you set this up.