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# Based on line number : sed -n 'startlineNumber,endlineNumber p' inputfile # Based on a pattern which can be timestamp as well : sed -n '/start-pattern/,/end-pattern/p' inputfile > extracted_file

Refer :   http://superuser.com/questions/262757/changing-current-version-of-java-within-windows http://stackoverflow.com/questions/3333553/how-can-i-change-the-java-runtime-version-on-windows-7