On a (relatively) fresh installation of Ubuntu 18.04, I'm experiencing failures related to certificate validation. First the Dropbox installer could not download the binary client. I also notice that wget is unable to valdiate certificates with domains such as dropbox.com and github.com which are surely configured correctly. I'm also unable to install any Ruby gems. Any suggestions on fixing would be appreciated!


Turns out the solution was to run sudo dpkg-reconfigure ca-certificates. Not sure why this was needed, but fixed things for me.


Since it's somewhat related, there was another fix necessary for Java found here.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.