Spoken Tutorial, IIT Bombay 
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	         Sed - Stream Editor       
	Sed commands with Files - Assignment

Try the below commands and see the output.

1. sed '4,6 r new_books.txt' IndianBooks.txt
2. sed '/The/ r new_books.txt' IndianBooks.txt
3. sed '4,6 r date' IndianBooks.txt
4. sed '/My/ e date' IndianBooks.txt