Problem with SSH

[Former Member]

Hi,

I have written a script file that first makes a ssh connection with the remote system and then does some job. My script file is as follows

#! /bin/sh
ssh 172.16.1.2 <<EOF
sa=`/usr/sbin/alternatives --config java </root/Desktop/1.txt 2>&1 | grep jdk1.6.0_05`
echo $sa
sa2=`echo $sa | sed -e 's/[^0-9]//g'`
sa3=`echo $sa2 | head -c 1 >/root/Desktop/2.txt` 
echo @sa3
echo "end"
EOF

The ssh connection is formed successfully. But sa is not printing anything. just a blank line

similarly sa3. But end is being printed. Both text files (1.txt and 2.txt)resides in the remote system. I know the problem is with this line

sa=`/usr/sbin/alternatives --config java </root/Desktop/1.txt 2>&1 | grep jdk1.6.0_05`

The command is not taking input from 1.txt which is residing on the remote system. Where am i going wrong.

[former_member185954 · Accepted solution]

Hello,

I think when you start a SSH connection to a remote server you invoke a shell in the remote server. Your currently executing shell script (which invokes the ssh connection) will run on your local machine and not the remote server.

Regards,

Siddhesh

[former_member185954]

you need to modify the script with something like:

ssh <remote host> <command 1>

ssh <remote host> <command 2>

ssh <remote host> <command 3>

ssh <remote host> <command 4>

ssh <remote host> <command 5>

Regards,

Siddhesh

[Former Member]

Hi Siddesh

Ya i can execute the script file now successfully.. But still am struck at a place.

sat=`ssh 172.16.1.2 /usr/sbin/alternatives --config java </root/Desktop/1.txt 2>&1 | grep jdk1.6.0_05`

sat2=`ssh 172.16.1.2 echo $sat | sed -e 's/[^0-9]//g'`

`ssh 172.16.1.2 echo $sat2 | head -c 1 >/root/Desktop/3.txt` 

sat4=`ssh 172.16.1.2 /usr/sbin/alternatives --config java </root/Desktop/3.txt 2>&1` 

The first three lines gives me the expected results.. But the last one which takes input from 3.txt is not giving proper result... Its reading a wrong choice.... Think the problem is reading that 3.txt which has just been updated.. how can i get around this problem

[former_member185954]

Hello,

Remove the ` characters in the 3rd line.

Regards,

Siddhesh