zulip 设置需要有 Vagrant 设置。 https://github.com/zulip/zulip 但在 Ubuntu 14.04 中失败
$vagrant plugin install vagrant-lxc
Installing the 'vagrant-lxc' plugin. This can take a few minutes...
Installed the plugin 'vagrant-lxc (1.2.1)'!
$vagrant up
Failed to load the "vagrant-lxc" plugin. View logs for more details.
Bringing machine 'default' up with 'virtualbox' provider...
There are errors in the configuration of this machine. Please fix
the following errors and try again:
vm:
* The box 'ubuntu/trusty64' could not be found.
有什么想法可能会出错吗?