ubuntu 18.04. Error mongodb “reason: Connection refused” Error: couldn’t connect to server 127.0.0.1:27017

es: que tal, gente, ┬┐como han estado?. necesito ayuda con este problema en mongodb, no se como resolverlo, he probado con distintas soluciones como: mongod –repair, systemctl enable mongodb.service, systemctl start mongodb.service, reinstalar y ninguna me funcion├│. les agradezco su ayuda.

en: Hello, how are you?. I installed mongodb and I need help with this problem in mongodb, I don’t know how to resolve it, I’ve tried many options to resolve the error, such as: mongod –repair, systemctl enable mongodb.service, systemctl start mongodb.service, reinstall, but none it worked. excuse me for my english, isn’t good. thank you for your help.

error mongodb connection refused status mongodb.service