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Delete lines from huge file

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# 1  
Old 02-01-2006
Delete lines from huge file
I have to delete 1st 7000 lines of a file which is 12GB large. As it is so large, i can't open in vi and delete these lines. Also I found one post here which gave solution using perl, but I don't have perl installed. Also some solutions were redirecting the o/p to a different file and renaming it. But since the file is 12GB large, redirecting the other lines would take too long. Please provide a simple solution.

Thanks.
Rahul.
# 2  
Old 02-01-2006
how about ex ?

ex filename
:1,7000 del
:wq
# 3  
Old 11-13-2006
Hi Rahul,

Try this one
sed '1,7000d' filename > file1
mv file1 > filename ( if required the rest of things in file)
009satya
# 4  
Old 11-13-2006
Another ways :
Code:
tail +7001 filename > temp_file && mv temp_file filename

awk 'NR>7000' filename > temp_file && mv temp_file filename


Jean-Pierre.
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