Linux string manipulation.

I am looking for a Linux command or script that retrieves a particular string from a file and write it to another file.
 The file to be searched is a log file that may contain e-mail addresses in the following format “”
I need to retrieve "thisstring" wherever found and write it to another file.

My approach was to search for “no.reply+” substring using grep command and then use another command that retrieves the string between the second + sign and the @ sign, but I need help writhing the complete command.

Any help is appreciating it.

Thanks in advance.
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mhenry20IT Operations DirectorCommented:
grep "no.reply+" filename | cut -d "+" -f 3
mhenry20IT Operations DirectorCommented:
More information cut:

-d = delimeter in this case the + sign.
-f = field to return in this case the third field.

So -f 1 = no.reply
-f 2 = something
-f 3 =

in case you need to adjust fields.
AbdellahTAuthor Commented:
I ran the command but the result are lines start with ..........
How can I make the command to return only "thisstring"?
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mhenry20IT Operations DirectorCommented:
grep "no.reply+" filename | cut -d "+" -f 3|cut -d "@" -f 1

That will cut again at the @ sign and return the first field. thisstring.

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AbdellahTAuthor Commented:
grep "no.reply+" under some systems might behave as egrep and match no.replyyyyyyyyyy

you should fgrep for exact string matching.
even if it doesn't matter due to the input, it makes your intention clearer in the code.
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