EUREKA!!! Thank you so much devsoftazilim.
I checked what you said me but seems to be correct all. But you give me the clue to solve the problem. After checking my hostname y saw that was correct, what I had to do is edit “/etc/host” file and leave it like this:
127.0.0.1 localhost hostnameofmymachine
::1 localhost hostnameofmymachine
Reload network settings and that’s it!
THANK YOU SO MUCH!