It is very difficult for them, who are working on Linux command line and suddenly they realized that they have to comment few lines. The number of lines can be in 10s, 100s or even in 1000s.
They start adding # in front of every line to be consider it as a comment. What if it can be done with just two small lines?
The trick is here;
Write below two lines between the lines you want to make comments.
<< The unique name you choose for comment
Your lines will be here
The unique name you choose for comment
You are done.