[RUBY] Terminal does not start

Is there something like this? I typed rails s in the terminal

 Address already in use - bind(2) for "" port 3000 (Errno::EADDRINUSE)

May give an error ・ Address already in use (The address is already in use) will be translated.

Cause Error "" "port 3000" is already in use

Reference https://qiita.com/nagao_norihiro/items/aba40bd4e0eac9f9a92d https://qiita.com/Shimba/items/1a234ebb646bb01d16cd

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