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Unix reqular expression usage

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I would like to know how can I use a regular expression to search a string in a line and also in a file I am using head -2 | egrep "^_([a-z])_$" | wc -c it only displays the row, but not the count. My file looks like: _version_|N|02313.00| | | _fxtrans_| USD|HOK| I need to grep _xxxx_ string and print it and also count the occurance. In above line it should print _version_ _fxtrans_ and output as 2

formula to compare the va...

Fraps LP5 error

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