[opensuse] How to insert lines into text file ?

16 Aug 2007

      Hi all !

I would like to insert a new line on each second line, like that:

pre.txt:
line1
line2
line3

After.txt:
line1

line2

line3

I have found the "echo -e "\n" " command to actually insert a new
line, but how to automate the process so every second line will get a
new line ?

please help

-- 
-Alexey Eremenko "Technologov"
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