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[port 3000 is already in use, solution to the problem of 3000 port being occupied]

2022-07-19 14:45:00 【A passing rookie】

Use cmd Command to release the occupied port

Passed today npm run dev start-up express when , Yes 3000 The port has been used , After thinking for a while, it should be that when exiting before, you directly clicked “x” Shut down the terminal , Not through ctrl+c Caused by the end of service .

Error message ：
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First win+R Input cmd Click ok , Get into cmd Command window ：
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Then input ：netstat -ano|findstr "3000" press return , The... Of the occupied port will be displayed PID Number , What I'm showing is “2768”.

End now 2768 This process inputs ：taskkill -pid 2768 -f

Finally, start again express You can make it The start command may be different Some may be npm start, What is it Look at the back end pakege.json in Code for
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