I'm using Vagrant 1.8.1 on Ubuntu 16.04 hosting Debian Jessie.I've set up an account with Atlas, logged in from the terminal, execute:vagrant shareAnd I'm getting the help screen with the exit code 1.There seems to be an open issue at GitHub here from January '16. I've tried to troubleshoot myself withvagrant up --debug 2>logBut nothing appears in the log when I do share.A possibly weird thing is that the share command is missing among the commands at /usr/share/vagrant/plugins/commands. It's also missing in the listing produced with:vagrant list-commandsIt's also missing in the same folder at GitHub and I don't see it there in the GitHub history. It's not missing in the documentation though.I don't know Ruby, so there's not much point in reading /usr/bin/vagrant, which I did anyhow.UPDATEIn reply to @jayhendren.$ vagrant plugin install vagrant-shareInstalling the 'vagrant-share' plugin. This can take a few minutes.../usr/lib/ruby/2.3.0/rubygems/specification.rb:946:in `all=': undefined method `group_by' for nil:NilClass (NoMethodError)    from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:275:in `with_isolated_gem'    from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:231:in `internal_install'    from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:102:in `install'    from /usr/lib/ruby/vendor_ruby/vagrant/plugin/manager.rb:62:in `block in install_plugin'    from /usr/lib/ruby/vendor_ruby/vagrant/plugin/manager.rb:72:in `install_plugin'    from /usr/share/vagrant/plugins/commands/plugin/action/install_gem.rb:37:in `call'    from /usr/lib/ruby/vendor_ruby/vagrant/action/warden.rb:34:in `call'    from /usr/lib/ruby/vendor_ruby/vagrant/action/builder.rb:116:in `call'    from /usr/lib/ruby/vendor_ruby/vagrant/action/runner.rb:66:in `block in run'    from /usr/lib/ruby/vendor_ruby/vagrant/util/busy.rb:19:in `busy'    from /usr/lib/ruby/vendor_ruby/vagrant/action/runner.rb:66:in `run'    from /usr/share/vagrant/plugins/commands/plugin/command/base.rb:14:in `action'    from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:32:in `block in execute'    from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:31:in `each'    from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:31:in `execute'    from /usr/share/vagrant/plugins/commands/plugin/command/root.rb:56:in `execute'    from /usr/lib/ruby/vendor_ruby/vagrant/cli.rb:42:in `execute'    from /usr/lib/ruby/vendor_ruby/vagrant/environment.rb:268:in `cli'    from /usr/bin/vagrant:173:in `<main>'The same with sudo.And I get the same error when I try to install any other plugin. I couldn't find vagrant-share listed anywhere as available anywhere. Unlike this one and called so:$ vagrant plugin install vagrant-netinfo
Vagrant share command missing
ubuntu;vagrant
After I found a similar one and one more, I kicked away the Ubuntu packaged vagrant and got an original one from Vagrant. Easy peasy, now it's ok.