I need to edit a good number of files, by inserting a line or multiple lines either right below a unique pattern or above it. Please advise on how to do that using sed, awk, perl (or anything else) in a shell. Thanks! Example:
some text
lorem ipsum dolor sit amet
more text
I want to insert consectetur adipiscing elit after lorem ipsum dolor sit amet, so the output file will look like:
some text
lorem ipsum dolor sit amet
consectetur adipiscing elit
more text