【ERROR】Port 4200 is already in use. Use '--port' to specify a different port.

Cielo______

于 2019-04-22 18:12:43 发布

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分类专栏： composer开发记录文章标签： composer

本文链接：https://blog.youkuaiyun.com/qq_38904077/article/details/89457818

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本文记录了一次在启动Node.js项目时遇到的端口4200被占用的问题，详细展示了如何通过命令行找到占用端口的进程并终止，从而成功启动项目的过程。

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报错

cielo@cielo-ThinkPad-E550:~/cprogrames/csupplychain/CSupplyChain$ npm start

> CSupplyChain@0.0.1 start /home/cielo/cprogrames/csupplychain/CSupplyChain
> ng serve --proxy-config proxy.conf.js --host localhost

Port 4200 is already in use. Use '--port' to specify a different port.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! CSupplyChain@0.0.1 start: `ng serve --proxy-config proxy.conf.js --host localhost`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the CSupplyChain@0.0.1 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/cielo/.npm/_logs/2019-04-22T09_26_41_992Z-debug.log

解决方法

cielo@cielo-ThinkPad-E550:~/cprogrames/csupplychain/CSupplyChain$ sudo lsof -t -i:4200
16489
cielo@cielo-ThinkPad-E550:~/cprogrames/csupplychain/CSupplyChain$ sudo kill -9 16489