I am getting the error "Update Failed: Download failed. cURL error 6: Could not resolve host:" on WordPress on my vps server...I have also noticed it in other applications as well.
As a consequence, WordPress network no longer allows automated install of plugins, and I think also updating them doesn't work either.
What does this usually mean? I have googled it however answers I have found seem to almost always say, check with your web host. So with that in mind i am convinced its a configuration problem that has arisen on my vps ( perhaps as a result of an update or corruption or a security setting I may have changed )
I run virtualmin control panel on top of the O/S. This forum seems to be a far better place to get answers rather than the virtualmin one.
Typically, what problem solving solutions should I try for resolving this error on a debian based system?