Are the lines of a file indexed?

Are the lines of a file indexed?

References

Reference NO 1

http://www.perlmonks.org/?node_id=865058

Reference NO 2

http://splunk-base.splunk.com/answers/11512/how-to-not-index-first-x-lines-in-csv-file

Reference NO 3

http://stackoverflow.com/questions/10530438/remove-lines-from-a-file-by-using-an-index-array

Reference NO 4

http://stackoverflow.com/questions/9308241/does-multi-file-unified-diff-requires-index-lines

Reference NO 5

http://ss64.com/nt/

Reference NO 6

http://social.msdn.microsoft.com/Forums/vstudio/en-US/d47c3e79-08b0-40a9-9fb7-af683c40d755/action?threadDisplayName=tip-1-index-lines-in-large-text-file-for-fast-random-access

Reference NO 7

http://www.census.gov/geo/www/tiger/

Reference NO 8

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