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AWK Command to duplicate lines in a file?

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# 1  
Old 11-30-2011
AWK Command to duplicate lines in a file?
Hi,
I have a file with date in it like:
UserString1
UserString2
UserString3
UserString4
UserString5

I need two entries for each line so it reads like

UserString1
UserString1
UserString2
UserString2

etc. Can someone help me with the awk command please?

Thanks
# 2  
Old 11-30-2011
Code:
$ sed p infile
$
$ awk '{print $0"\n"$0}' infile

This User Gave Thanks to jayan_jay For This Post:
Grueben
# 3  
Old 11-30-2011
Code:
awk 1\;1 infile

These 2 Users Gave Thanks to Scrutinizer For This Post:
Grueben pandeesh
# 4  
Old 01-03-2012
Quote:
Originally Posted by Scrutinizer
Code:
awk 1\;1 infile

This is an awesome one liner!
# 5  
Old 01-03-2012
Quote:
Originally Posted by pandeesh
This is an awesome one liner!
Thanks pandeesh Smilie
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