Unix Tip: EDITING OF LARGE FILES

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UNIX HOT TIP

Unix Tip 3590 - December 8, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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EDITING OF LARGE FILES

Ever failed to open a very large
file for editing in vi. Just try
this tip:

Suppose you want to make changes
in top 500 lines of a 100 line file
abc.txt.

tail +500 abc.txt > tail.txt
head -500 abc.txt > head.txt

Edit file head.txt by opening in
a vi editor.

Now append file tail.txt to
head.txt by:

cat tail.txt >> head.txt
mv head.txt > abc.txt
rm head.txt tail.txt

This tip generously supported by: akash@cadence.com

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