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Top Forums Shell Programming and Scripting Help: Regular Expression for Negate Matching String Post 302327717 by jim mcnamara on Monday 22nd of June 2009 11:55:28 AM
Old 06-22-2009
Do you mean
1. find out if it ever occurs in the file
Code:
grep -q 'javax\.servlet.http\.HttpServlet\.service' somefile.txt
if [[ $? -ne 0 ]] ; then
 echo "file is okay - no string found"
fi

2. print lines that do not have the pattern
Code:
grep -v 'javax\.servlet.http\.HttpServlet\.service' somefile.txt

Otherwise please explain what you want, not how you wanted to do it. A negated character class (which what you wrote is not an example of) means 'match anything else except this'. grep -v [pattern] has this meaning.
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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