Script required


 
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# 1  
Old 02-16-2013
Script required

Hey All,
I am seeking for the script which will do as follows,

1) Login on one Unix server "Server1"
2) Want to access other Unix server "Server2", and want to get the information as, on one go.
Code:
df -k /tmp
df -k /
df -k "any file system"

3) Re-direct the output to "space.txt" on "Server1"

Appologies for such query, I dont know would it work or not as I am new in Unix scripting.

Appreciate the soonest support.

Regards,
R.Kodan

Last edited by Scrutinizer; 02-17-2013 at 06:40 AM.. Reason: code tags
# 2  
Old 02-16-2013
Search on "remsh".
This User Gave Thanks to panyam For This Post:
# 3  
Old 02-16-2013
You can also use ssh for executing commands on a remote machine.

Syntax:
Code:
ssh [user@]hostname [command]

Note that this approach will work without issuing password only if you have setup ssh-keys

In case it is not setup, here is a page that explains how to setup ssh-keys
This User Gave Thanks to Yoda For This Post:
# 4  
Old 02-17-2013
Thanks Panyam that works,
But I would like to use this with a script If you could help me to create such script.

1) Run command "server1# rsh server2 df -k /tmp" by mentioning it in script.
2)Script will use list of server from file "List.txt" exist under /tmp directory of server1 3) Will re-direct the output to >> "/tmp/output.txt" file

I guess by using while loop we can do it, but dont know the path/way to move ahead.

---------- Post updated at 03:19 AM ---------- Previous update was at 03:02 AM ----------

Thanks Bipinajith
# 5  
Old 02-17-2013
You may want to try sth like
Code:
#!/bin/bash
# set -vx

while read OPTIONS SERVER
        do
        echo "$SERVER"
        ssh "$OPTIONS" "$SERVER" <<-EOF
        df / /tmp /any
        EOF
        done < /tmp/List.txt > /tmp/output.txt

It is using keyless ssh login, as bipinajith proposed. Fiddling around with passwords in a script is usually discouraged. If you need to use rsh, you may need to tweak above a bit.
This User Gave Thanks to RudiC For This Post:
# 6  
Old 02-17-2013
Thanks Rudic, that is nearly to what I am seeking for. Some pending are like,

1) I have approx 500 server for which space needs to be calculated.
2) And these server does not have setup ssh-keys as required.
3) To setup ssh-keys on these many servers is tough task.
4) Any other way to get these details without setup ssh-keys and giving password.

Please suggest.
# 7  
Old 02-17-2013
I firmly believe that it is easier to once set up keys on 500 servers than to supply passwords every time you run that script (collecting 500 servers' passwords in a file is highly discouraged!).
A side effect to keyless setup would be that from then on, you can easily login to any of those servers interactively without password.
This User Gave Thanks to RudiC For This Post:
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