multiple command in ssh not working for me.

Monika32011 · 04-22-2011, 11:54 PM

Hi

I have prepared a script which will login to each server and search for a keyword.
I want output on same machine from where m running script.

When i try to run command on any machine.. It works well.

w=$(grep -irH "keyword.com" /home/*/public_html/*);if [ $? -eq 0 ];then echo -e "\n $HOSTNAME";echo $(grep -irH "keyword.com" /home/*/public_html/* | cut -d: -f1 | uniq | awk '{for (i=1;i<=NF;i++) printf "%s \n",$i}');fi

but its not working in script with ssh
its gives below error:
script.sh: line 5: syntax error near unexpected token `('

Script is:

#!/bin/ksh
echo -e "Script to check and list if keyword is being used by any server \n" > /tmp/test.txt
for f in `cat /root/sync_script/serverlist1.txt`
do
ssh $f.exam5.com 'w=$(grep -irH "keyword.com" /home/*/public_html/*);if [ $? -eq 0 ];then echo -e "\n $HOSTNAME";echo $(grep -irH "keyword.com" /home/*/public_html/* | cut -d: -f1 | uniq | awk '{for (i=1;i<=NF;i++) printf "%s \n",$i}');fi' >> /tmp/test.txt
done

Please respond ASAP.

Thanks & Regards,
Monika

xeleema · 04-23-2011, 12:02 AM

Greetingz!
Try putting a space between your "$(" and "grep -irH"

Monika32011 · 04-23-2011, 02:05 AM

Tried, But still no luck :-(

druuna · 04-23-2011, 04:48 AM

Hi,

Try changing ' to " for the ssh command. I.e: ssh $f.exam5.com "........." instead of ssh $f.exam5.com '.........'

Hope this helps.

Don't demand an immediate answer, we are all volunteers here at LQ.....

Monika32011 · 04-23-2011, 06:13 AM

Have already tried that, it will execute script on same server but wont do ssh :-(
Have also tried putting back tick (`) instead of (') and without anything as well.. gives same result, executes on same server.

I think it is getting confused between 2 pair of quotes ('), but is required at both places for ssh and awk.
It gives lot of error if I remove quotes from awk command.

Please advise.

markush · 04-23-2011, 06:32 AM

Hello Monika,

unfortunately I cannot help whith your question. But I would recommend to use the "report" button (at one of your posts) and ask a Moderator to move this thread to the "Programming" part of LQ http://www.linuxquestions.org/questions/programming-9/. I think you will find more help there.

Markus

druuna · 04-23-2011, 07:25 AM

Hi,

Looking at the script I do wonder if this isn't too complicated for what you have in mind.

I do believe you want to check, on different hosts, if a certain string is present in multiple files and if this is the case you want to print the host name and the file name(s).

If my above assumption is correct, try the following:

Code:

#!/bin/ksh

echo -e "Script to check and list if keyword is being used by any server \n" > /tmp/test.txt

for HOST in `cat /root/sync_script/serverlist1.txt`
do
  ssh $HOST.exam5.com ' OUTPUT=$(grep -irH "keyword.com" /home/*/public_html/*) ; if [ $? -eq 0 ] ; then echo -e "\n $HOSTNAME" ; echo $OUTPUT | cut -d: -f1 ; fi' >> /tmp/test.txt
done

This is based on assumptions, I don't know what the generated input and output is in your case and which info you want to see. This also means the above solution is untested.

Anyway, hope this helps.

fbianconi · 04-23-2011, 07:44 AM

you sohuld escape the inner pair of single quotes, like this:

#!/bin/ksh
echo -e "Script to check and list if keyword is being used by any server \n" > /tmp/test.txt
for f in `cat /root/sync_script/serverlist1.txt`
do
ssh $f.exam5.com 'w=$(grep -irH "keyword.com" /home/*/public_html/*);if [ $? -eq 0 ];then echo -e "\n $HOSTNAME";echo $(grep -irH "keyword.com" /home/*/public_html/* | cut -d: -f1 | uniq | awk \'{for (i=1;i<=NF;i++) printf "%s \n",$i}\');fi' >> /tmp/test.txt
done

colucix · 04-23-2011, 01:47 PM

Moved: This thread is more suitable in Programming and has been moved accordingly to help your thread/question get the exposure it deserves. As per kind request.

colucix · 04-26-2011, 08:05 AM

Most likely the problem is - as already noticed - the opening single quote is actually closed by the opening single quote of the awk command. To prevent this behaviour you need to let the shell close it, then pass a literal single quote embedded in double quotes. Do the same for the closing single quote of the awk command and the trick is done:

Code:

ssh $f.exam5.com 'w=$(grep -irH "keyword.com" /home/*/public_html/*);if [ $? -eq 0 ];then echo -e "\n $HOSTNAME";echo $(grep -irH "keyword.com" /home/*/public_html/* | cut -d: -f1 | uniq | awk '"'"'{for (i=1;i<=NF;i++) printf "%s \n",$i}'"'"');fi' >> /tmp/test.txt

Toward the end of the line see the two sequences

Code:

'"'"'

that mean close the single quote, pass a literal single quote embedded in double quotes, re-open the single quotes. Hope this helps.