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07-08-2008
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grep with wilcard character(*)
Hello people,
I am trying to grep out a certain pattern from some files. The situation is like this: constantstring1<random data>constantstring2 I am using the following command (which clearly is not working!!!): datestring=<some date in YYYYMMDD format> searchstring=$datestring"*_xyz" grep -hc $searchstring a.txt Can you also be kind enough to give a short explanation for the solution? Thanks a lot. |
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07-08-2008
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You have to put a dot in front of the wildcard.
. means any character, but only one, * means the former character zero times or multiple occurence Ie. it's ".*" not "*". Best have the pattern in grep in " " too and the variable written like ${myvar} to avoid problems. |
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