Error: listen EADDRINUSE: address already in use :::2000

[alidabdul]

Running the script and always get this error
Error: listen EADDRINUSE: address already in use :::2000
I already kill all the node using this command: sudo killall -9 node
But the error still intact.

The port 2000 is written on the .env files

INFURA_KEY='infura key'

PORT=2000

PRIVATE_KEY='private key'

Here's the error log:

yarn run v1.22.5
$ nest start
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [NestFactory] Starting Nest application...
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] DiscoveryModule dependencies initialized +42ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] BotModule dependencies initialized +1ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] ConfigHostModule dependencies initialized +0ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] AppModule dependencies initialized +1ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] ScheduleModule dependencies initialized +0ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [InstanceLoader] ConfigModule dependencies initialized +0ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [RoutesResolver] AppController {/}: +7ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [RouterExplorer] Mapped {/, GET} route +3ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [RoutesResolver] BotController {/}: +1ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM     LOG [NestApplication] Nest application successfully started +6ms
[Nest] 27677  - 09/22/2021, 11:47:43 PM   ERROR [NestApplication] Error: listen EADDRINUSE: address already in use :::2000 +4ms
(node:27677) UnhandledPromiseRejectionWarning: Error: listen EADDRINUSE: address already in use :::2000
    at Server.setupListenHandle [as _listen2] (net.js:1310:16)
    at listenInCluster (net.js:1358:12)
    at Server.listen (net.js:1444:7)
    at ExpressAdapter.listen (/captain-bot-master/node_modules/@nestjs/platform-express/adapters/express-adapter.js:50:32)
    at /captain-bot-master/node_modules/@nestjs/core/nest-application.js:168:46
    at new Promise (<anonymous>)
    at NestApplication.listen (/captain-bot-master/node_modules/@nestjs/core/nest-application.js:157:16)
    at bootstrap (/captain-bot-master/src/main.ts:6:3)
(node:27677) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:27677) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.