On Fri, 26 May 2006, Paul M Foster wrote:
> Here's what I need to do (sometimes): Take a text file and split it into
> pieces. The split command won't work for this, because the pieces may not be
> equal. For example, I may want to split an 8000 line file into pieces 2000,
> 3000 and 3000 lines each. I'm willing to run the same command multiple times
> with different parameters, but whatever I use needs to be some common command
> expected to be there on any system. I've looked at split, head and tail. I
> suspect I can do this with sed or awk, but I'm not very familiar with those
> two, beyond rudimentary use. Can anyone suggest a solution?
Find out what line is the first that should be in the second file (call it L).
head -n L-1 filename > file1
tail +L filename > file2andLater
You could also do that as
sed Lq filename > file1
sed 1,Ld filename > file2andLater
if you really like sed.
Repeat for additional divisions, leapfrogging your way through the file.
I'm sure someone will come up with a method where you get a list of split
points from the original file and use that. That method lends itself more
readily to automation.
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