Since you are passing a string to perl that is supposed to be enclosed in single-quotes, you need to use SHELL-ESCAPE characters if you want to use single-quote inside that string. Or, use double-quotes.

Shell-escape is usually a backslash, similar to perl, so you need to b aware as to which backslash gets eaten by the shell, and which one is for perl's consumption.

Update: Ignore this - While the diagnosis is correct, the proposed solution is wrong. Better information in my response below...

Hi, Thanks for the Help ,yes,It's output from shell. I've tried using shell_escape, as below,

 perl -pi -e shell_escape('s#\Q(.*)\$/\',\$lines,\$matches))10.(.*)\$/
+\',\$lines,\$matches))(.*)\$/\',\$lines,\$matches))# #gi')  result.tx
+t > result1.txt
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but got the same erroe .. Unmatched '. Whether I have used the shell_escape correctly or not.. Thanks,

\' doesn't work in single-quoted literals in bourne shell.

$ echo 'foo\'bar'
>                      <- waits for closing '
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Fixes:

$ echo foo\'bar
foo'bar
$ echo "foo'bar"
foo'bar
$ echo 'foo'\''bar'
foo'bar
$ echo 'foo'"'"'bar'
foo'bar
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From the bash manual:

A single quote may not occur between single quotes, even when preceded by a backslash.

Hence - my previous suggestion is invalid - there is no "escaping" inside a single-quote.

Here is a shell trick to try:

 '"'"'
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Replace all perl-directed single quotes with that, and it should work.

Extremely ugly, though. Here is how it works:
It starts in single quotes, and which you want a single quote you come out, go into double quotation to quote a single quote, then come out of double quotation, to go back into single quotes again.

Using this trick, your command passes the shell's syntax:

 perl -pi -e 's#\Q(.*)\$/'"'"',\$lines,\$matches))10.(.*)\$/'"'"',\$li
+nes,\$matches))(.*)\$/'"'"',\$lines,\$matches))# #gi' result.txt > re
+sult1.txt

-- Output (from perl - bash is happy!!!) --
Can't open result.txt: No such file or directory.
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Update: I just noticed that my shell trick is identical to ikegami's (++) last example.

     Have you been high today? I see the nuns are gay! My brother yelled to me...I love you inside Ed - Benny Lava, by Buffalax

perl -n - gash.txt << END
    # insert fun Perl here
    print qq(Quote ': double: ");
END
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