Using sed to insert text file at first line


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# 1  
Using sed to insert text file at first line

Code:
sed '1r file.txt' <source.txt >desti.txt

This example will insert 'file.txt' between line 1 and 2 of source.txt.
Code:
sed '0r file.txt' <source.txt >desti.txt

gives an error message.

Does anyone know how 'sed' can insert 'file.txt' before the first line of source.txt?

Last edited by Franklin52; 03-28-2011 at 02:39 PM.. Reason: Please use code tags
# 2  
Does it have to be sed?
Code:
awk 'NR==1{system("cat file.txt")}1' source.txt >desti.txt

# 3  
Code:
cat file.txt source.txt >desti.txt

Smilie
# 4  
Bah, I feel silly now... Smilie
# 5  
@Bartus

LOL , you geek Smilie
# 6  
Why sed and not cat?

I suppose you could do something like sed : file1 file2
# 7  
Code:
sed '1s/^/New first line\^J/' inp_file

Where ^J is entered as two different key strokes:
<ctl-v> and <enter>
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