I have Vagrant 1.8.1 installed but apparently I need a higher version
As instructed in https://superuser.com/questions/845987/how-do-i-upgrade-vagrant-to-last-version-in-ubuntu I downloaded the latest release 2.0.1, opend it and pressed install, but nothing has changed.
I also did apt-get update but nothinged changed.
How can I upgrade vagrant?
This command did the work for me:
sudo dpkg -i vagrant_2.0.1_x86_64.deb