How to put a line comment for a multi-line command [duplicate]

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This is how I do it. Essentially by using Bash’s backtick command substitution one can place these comments anywhere along a long command line even if it is split across lines. I have put the echo command in front of your example so that you can execute the example and see how it works:

echo CommandName InputFiles `#1st comment` \
             --option1 arg1 `#2nd comment` \
             --option2 arg2 `#3rd comment`

Another example where you can put multiple comments at different points on one line:

some_cmd --opt1 `#1st comment` --opt2 `#2nd comment` --opt3 `#3rd comment`

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