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Need help on ssh usage in a loop of shell script

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# 1  
Old 04-10-2012
Need help on ssh usage in a loop of shell script
I need help on how to connect remote systems through ssh command in while loop of shell script. I was able to connect one remote system using ssh from shell script. Please find sample code snippet as given below…..


Code:
  ssh "root@148.147.179.100" ARG1=$rpmFileName 'bash -s' <<'ENDSSH'
                echo ">>Checksum ..."
                md5sum /root/$ARG1
ENDSSH

When tried to run same piece of code within a loop getting the error "syntax error: unexpected end of file", which I couldn’t resolve.

But when placing the same piece of code in another script file and using that file in while loop of another script, is working.

Can anyone help me with some solution.

Regards,
Rajesh Tulluri
Last edited by Scrutinizer; 04-10-2012 at 03:29 PM.. Reason: code tags
# 2  
Old 04-10-2012
The 'endssh' must be at the beginning of the line. It can't even be indented.
# 3  
Old 04-10-2012
I'm able to connect remote system when used the piece of code in shell script (out side while loop). Problem occurs when tried to connect a series of systems. i.e. getting error when attached piece of code used within while loop ... please find sample code as given below..

Code:
while read sysType serverIp uid pwd
do
 
  if [ -n "$serverIp" ]
  then
     valid_ip $serverIp
     #Assign the return value to a variable
     isValidIp=$?
   else
      isValidIp=1
  fi

  if [ $isValidIp -eq "0" ]
    then
       if [ "$sysType" = "ebox" ]
       then
           ssh "$address" ARG1=$rpmFileName 'bash -s' <<'ENDSSH'
              echo ">>Checksum ..."
              md5sum /root/$ARG1
           ENDSSH
        fi
    fi
done

Moderator's Comments:
Mod Comment Welcome to the UNIX and Linux Forums. Please use code tags. Video tutorial on how to use them
Last edited by Scrutinizer; 04-10-2012 at 03:29 PM.. Reason: Code tags
# 4  
Old 04-10-2012
Please have a look at Corona688's comment and then look at the position of the ENDSSH label in your script..
# 5  
Old 04-11-2012
Hi Corona688/Scrutinizer,
Thanks for your reply. But i couldn't understand the reply fully.. apologies for that. I understood that I need to use ENDSSH at the beginning of the line, do you mean I need to use the label as given below..
Code:

ENDSSH ssh -n "$address" ARG1=$rpmFileName 'bash -s'
echo ">>Checksum ..."
md5sum /root/$ARG1
ENDSSH

It's still giving error as "not a valid identifier" correct if i'm wrongly using the label...
Last edited by Franklin52; 04-11-2012 at 04:04 AM.. Reason: Please use code tags for code and data samples, thank you
# 6  
Old 04-11-2012
There are two endssh. One of them is indented. Which one would make the most sense to not indent, if I told you they couldn't be indented? The one that was indented? Or the one which wasn't?

Code:
while read sysType serverIp uid pwd
do
 
  if [ -n "$serverIp" ]
  then
     valid_ip $serverIp
     #Assign the return value to a variable
     isValidIp=$?
   else
      isValidIp=1
  fi

  if [ $isValidIp -eq "0" ]
    then
       if [ "$sysType" = "ebox" ]
       then
           ssh "$address" ARG1=$rpmFileName 'bash -s' <<'ENDSSH'
              echo ">>Checksum ..."
              md5sum /root/$ARG1
ENDSSH
        fi
    fi
done

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