Created `vagrant up` hangs at "Waiting for VM to boot. This can take a few minutes" (markdown)

`vagrant-up`-hangs-at-"Waiting-for-VM-to-boot.-This-can-take-a-few-minutes".md

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+As long as the issues regarding this topic are not resolved, I intend to sum up some workarounds working for me.
+
+## This is a list of issues related to this topic:
+
+- [#391](https://github.com/mitchellh/vagrant/issues/391)
+- [#455](http://github.com/mitchellh/vagrant/issues/455)
+- [#1064](https://github.com/mitchellh/vagrant/issues/1064)
+- [#1066](https://github.com/mitchellh/vagrant/issues/1066)
+
+## Workarounds
+
+1. Reboot using GUI mode and fix network issues manually
+    
+    After rebooting in GUI mode, and issuing
+
+        $ /etc/init.d/networking/restart
+
+    will SOMETIMES solve the problem. 
+ 
+    Some people also proposed to add the above line to /etc/r.local or similar. But in my experience, this will not finally solve the problem.
+
+1. Reboot using shell provisioner to fix network issues
+
+    Instead of booting in GUI mode and fix networking issues manually, some people propose to doing this via shell provisioner:
+
+        config.vm.provision :shell, :inline => "/etc/init.d/networking restart"
+
+    I tried this several times, but it failed most often.
+
+1. Recover VM state using VBoxManage
+
+    When changing the environment (Office, Home Office, Coop) which also means the network, the issue occurs everytime. The solution is to simply poweroff the machine by
+
+        VBoxManage controlvm <vm-id> poweroff
+
+    After this the vm can be started again by
+
+        vagrant up