matar el puerto ya en uso
kill -9 $(lsof -i tcp:3000 -t)
Fancy Fox
kill -9 $(lsof -i tcp:3000 -t)#To list any process listening to the port 8080:
lsof -i:8080
#To kill any process listening to the port 8080:
kill $(lsof -t -i:8080)
#or more violently:
kill -9 $(lsof -t -i:8080)sudo kill -9 `sudo lsof -t -i:9001`
npx kill-port 3000
kill $(lsof -ti:3000) kill $(lsof -t -i:8080)
//kill port 8080