diff --git a/cf_remote/Vagrantfile b/cf_remote/Vagrantfile
index 569c062..8a88cde 100644
--- a/cf_remote/Vagrantfile
+++ b/cf_remote/Vagrantfile
@@ -26,7 +26,11 @@ Vagrant.configure("2") do |config|
       node.vm.box = VM_BOX
 
       node.vm.provision "shell" do |s|
-        ssh_pub_key = File.readlines("#{Dir.home}/.ssh/id_rsa.pub").first.strip
+        ssh_pub_key_path = "#{Dir.home}/.ssh/id_rsa.pub"
+        if !File.file?(ssh_pub_key_path)
+          abort "SSH key not found at #{ssh_pub_key_path}. Please create one with: ssh-keygen -t rsa -b 4096"
+        end
+        ssh_pub_key = File.readlines(ssh_pub_key_path).first.strip
         s.inline = <<-SHELL
         echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
         echo #{ssh_pub_key} >> /root/.ssh/authorized_keys