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Shell Programming and Scripting

Insert shell command into first line of output file

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# 1  
Old 02-13-2012
Insert shell command into first line of output file
How can I insert the command executed on the shell into the first line of my output file?

For example if I execute;

Code:
zcat *.gz |grep “User5501” > users.out



How can I make my users.out look like;

Code:
zcat *.gz |grep “User5501” > users.out
User5501 PA
User5501 UA
User5501 ZA
User5501 NU
User5501 NA
User5501 RU
User5501 ME
User5501 UAE
User5501 UK
User5501 IR
User5501 RE
User5501 NP

# 2  
Old 02-13-2012
Execute this after you execute your command:
Code:
sed -i '1i zcat *.gz |grep "User5501" > users.out' users.out

# 3  
Old 02-13-2012
Thanks, I suppose I could just do this;
Code:
echo "zcat *.gz |grep “User5501” > users.out" > users.out | zcat *.gz |grep “User5501”  >> users.out

Last edited by Franklin52; 02-13-2012 at 10:02 AM.. Reason: Please use code tags for data and code samples, thank you
# 4  
Old 02-13-2012
Code:
 
echo 'zcat *.gz |grep “User5501” > users.out' > users.out
zcat *.gz |grep “User5501” >> users.out

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