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    The grep command searches one or more input files for lines containing a match to a specified pattern.

    How can I list just the names of matching files?

    grep -l 'main' *.c


    How do I search directories recursively?

    grep -r 'hello' /home/gigi


    Suppose I want to search for a whole word, not a part of a word?

    grep -w 'hello' *


    How do I output context around the matching lines?

    grep -C 2 'hello' *


    How can I search in both standard input and in files?

    Use the special file name `-':
    cat /etc/passwd | grep 'alain' - /etc/motd


    more on

    http://www.gnu.org/software/grep/doc/grep.html


    try

    $ cat FILENAME|grep SUCHWORT1|grep UND_SUCHWORT2|grep -v OHNE_SUCHWORT3|grep -i SuChWoRt4

    manpage[edit]

    <man>grep</man>

    see also: mansearch, man2html


    jargon[edit]

    <jargon />

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