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Thread: insert a header in a huge data file without using an intermediate file
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  #4 (permalink)  
Old 02-10-2009
ddreggors ddreggors is offline
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Join Date: Aug 2008
Posts: 91
You can even use the sed 'insert' command along with -i (inline) option to place the the "header" at a specific line number (like line 1).

Something like this should work:
Code:
sed -i '1 i \Some Header Text Here' ExtractDataFile.dat