How to capture the output of a top command in a file in linux?

Question

I want to write the output of a specific \'top\' command to a file. I did some googling and find out that it can be done by using the following command.

top         


        

Answer 1

As pointed out by @Thor in a comment, you just need to ensure that grep is not buffering arbitrarily but per-line with the --line-buffered option:

top -bn 10 | grep 'init' --line-buffered | tee top-output.txt

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_{Without grep-ing, redirecting the output of top to a file works just fine, interrupt included.}