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Appending Date at the end ONLY in first line of file

 
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# 1  
Old 08-09-2012
Data Appending Date at the end ONLY in first line of file
Hi,

My requirement is to append a date in format DDMMYYYYHHMISS at the end of first line of file which is HEADER. I am trying command

sed -i '1s/.*/&<date_format>/' <file_name>

Where <date_format>=`date +%m%d%Y%H%M%S`
I am somehow misisng the right quotes ti get this added in above command .. would someone please assist me ?

Thanks
Sam
# 2  
Old 08-09-2012
Code:
sed -i '1s/.*/&'"$(date +%d%m%Y%H%M%S)"'/' infile

# 3  
Old 08-09-2012
Try awk:
Code:
awk -vdate="$(date +%d%m%Y%H%M%S)" 'NR>1 {date=""} {print $0 date}'

 
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