Merge pull request #3 from dmlond/master

update

Author: el-mat

docs/2015-05-12/Worksheet.md

@@ -24,3 +24,35 @@ Launching a tiny Linux with Vagrant
 - This box does not use `bash`, it uses `sh`. Specify this in the Vagrantfile using `config.ssh.shell="sh"`
 - When you're done configuring the Vagrantfile, save it, then launch the VM with `vagrant up`
 - There might be some error messages where it tries to "mount" folders. If you wait long enough it'll give up - it's not a problem.
+
+Launching and provisioning a usable Linux with Vagrant and Puppet
+=================================================================
+
+![tahr](http://www.exclusiveadventuresnz.com/images/hunting/big-game/bull-tahr/bull-tahr-banner1.jpg)
+
+- Have a look at this edited [Vagrantfile](https://github.com/dmlond/arangs2015/blob/master/conf/vagrant/Vagrantfile)
+- Which Linux distribution is specified in this file? Can you find it in the vagrant cloud? Is this a common distribution? 
+How does it compare to the operating system of your host desktop? Are there likely to be guest additions for this
+distribution?
+- Provisioning is the process of installing and configuring additional tools on a base OS. Before lunch we saw an
+example of provisioning using shell commands in the Vagrantfile. Which provisioner is used in this edited Vagrantfile?
+- Install `puppet` using the following commands:
+
+```
+    sudo dpkg -i puppetlabs-release-trusty.deb
+    sudo apt-get update
+    sudo apt-get -y install puppet
+```
+
+- Now have a look at [this provisioning script](https://github.com/dmlond/arangs2015/blob/master/conf/vagrant/manifests/default.pp).
+- What would the instructions after `dl_bwa` (line 35) do?
+- What immediately preceding steps does `untar_bwa` require?
+- What is the Current Working Directory (`cwd`) where BWA is unzipped?
+- What is the function of `symlink_bwa`? What other methods could be used to achieve the same effect (think of `$PATH`)
+- Do a test run of the provisioning script. If you do it as follows, nothing will be installed yet:
+
+ `puppet apply --noop default.pp`
+
+- Now try to add another install command to the provisioning script. Make the command clone the course github repo 
+(`git clone`). Make this happen in the home directory of the vagrant user (`cwd` should specify this). Make sure that
+the for this step required package `git` is already installed. Specify the name of the folder that will be created.