Insert shell command into first line of output file

Shell Programming and Scripting
1

How can I insert the command executed on the shell into the first line of my output file?

For example if I execute;

zcat *.gz |grep �User5501� > users.out

How can I make my users.out look like;


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

Execute this after you execute your command:

sed -i '1i zcat *.gz |grep "User5501" > users.out' users.out
3

Thanks, I suppose I could just do this;

echo "zcat *.gz |grep �User5501� > users.out" > users.out | zcat *.gz |grep �User5501�  >> users.out
4 
 
echo 'zcat *.gz |grep �User5501� > users.out' > users.out
zcat *.gz |grep �User5501� >> users.out