Find and stop what's using a port

Fill these in once

Port number

See what's using the port
Terminal
```
lsof -i :3000
```
Stop it
Terminal
```
kill -9 $(lsof -ti :3000)
```

See what's using the portNeeds sudo
Terminal · Ubuntu / Debian
```
sudo lsof -i :3000
```
Stop itNeeds sudo
Terminal · Ubuntu / Debian
```
sudo fuser -k 3000/tcp
```

See what's using the port

PowerShell

Get-Process -Id (Get-NetTCPConnection -LocalPort 3000 -State Listen).OwningProcess

Stop it

PowerShell

Get-NetTCPConnection -LocalPort 3000 -State Listen | Select-Object -ExpandProperty OwningProcess -Unique | ForEach-Object { Stop-Process -Id $_ -Force }