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Append to beginning of a file

 
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# 1  
Old 09-25-2008
Append to beginning of a file
Hi,

I have a file x which is being upated continuously.

I want to add file y in the file x but at the beginning of file x.

file x file y After commands file x

eeee aaaa aaaa
gggg bbbb bbbb
hhhh cccc cccc
eeee
gggg
hhhh

I want to do this ina script.

Thanks for your help.
# 2  
Old 09-25-2008
Unix file systems do not generally allow for insertion. You will basically have to do something like

Code:
cat new old >temp
mv temp old

The sed i and r command might be useful to look at, though.
# 3  
Old 09-25-2008
The file is being updated continuously, so that might not be the right solution as data should not be lost in moving to a temp file and renaming it.

sed -i, should probably do what you are looking for.
 
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