I'm trying to use a tag in sed, so I can tag part of the line and
replace other parts as show below.
Do you know what I'm doing wrong?


sed 's/\nuserPrincipalName.+\n)/\nuserPrincipalName:\1uid:\1/g'
OUTPUT-ba.txt > output.txt


output-ba.txt
userPrincipalName: Joe Mama
userPrincipalName: Yo Mama

output.txt
userPrincipalName: Joe Mama
uid: Joe Mama
userPrincipalName: Yo Mama
uid: Yo Mama

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