roscore error message [closed]
I have some problem when I excute [roscore]. This is error message [You must specify a valid interface name]. I refer others solution like excute [pip install --upgrade netifaces], but it still has some question. When I excute [pip install --upgrade netifaces], I get this [cannot fetch index base URL. Counld not find any diwnloads that satisfy the requirement netifaces. No distribution at all found for netifaces]. Thank you for any advises.
How did you install ROS? What version are you running? What command are you running, and what's the full output?