Apply Markdown best practices (block code language specification, spacing between lines, spacing between char, ...

docs/02-client-tools.md

@@ -2,7 +2,6 @@
 
 In this lab you will install the command line utilities required to complete this tutorial: [cfssl](https://github.com/cloudflare/cfssl), [cfssljson](https://github.com/cloudflare/cfssl), and [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl).
 
-
 ## Install CFSSL
 
 The `cfssl` and `cfssljson` command line utilities will be used to provision a [PKI Infrastructure](https://en.wikipedia.org/wiki/Public_key_infrastructure) and generate TLS certificates.
@@ -11,38 +10,38 @@ Download and install `cfssl` and `cfssljson`:
 
 ### OS X
 
-```
+```bash
 curl -o cfssl https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/darwin/cfssl
 curl -o cfssljson https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/darwin/cfssljson
 ```
 
-```
+```bash
 chmod +x cfssl cfssljson
 ```
 
-```
+```bash
 sudo mv cfssl cfssljson /usr/local/bin/
 ```
 
 Some OS X users may experience problems using the pre-built binaries in which case [Homebrew](https://brew.sh) might be a better option:
 
-```
+```bash
 brew install cfssl
 ```
 
 ### Linux
 
-```
+```bash
 wget -q --show-progress --https-only --timestamping \
   https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/linux/cfssl \
   https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/linux/cfssljson
 ```
 
-```
+```bash
 chmod +x cfssl cfssljson
 ```
 
-```
+```bash
 sudo mv cfssl cfssljson /usr/local/bin/
 ```
 
@@ -50,22 +49,23 @@ sudo mv cfssl cfssljson /usr/local/bin/
 
 Verify `cfssl` and `cfssljson` version 1.3.4 or higher is installed:
 
-```
+```bash
 cfssl version
 ```
 
 > output
 
-```
+```bash
 Version: 1.3.4
 Revision: dev
 Runtime: go1.13
 ```
 
-```
+```bash
 cfssljson --version
 ```
-```
+
+```bash
 Version: 1.3.4
 Revision: dev
 Runtime: go1.13
@@ -75,45 +75,45 @@ Runtime: go1.13
 
 The `kubectl` command line utility is used to interact with the Kubernetes API Server. Download and install `kubectl` from the official release binaries:
 
-### OS X
+### Install on OS X
 
-```
+```bash
 curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/darwin/amd64/kubectl
 ```
 
-```
+```bash
 chmod +x kubectl
 ```
 
-```
+```bash
 sudo mv kubectl /usr/local/bin/
 ```
 
-### Linux
+### Install on Linux
 
-```
+```bash
 wget https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kubectl
 ```
 
-```
+```bash
 chmod +x kubectl
 ```
 
-```
+```bash
 sudo mv kubectl /usr/local/bin/
 ```
 
-### Verification
+### Verification install
 
 Verify `kubectl` version 1.15.3 or higher is installed:
 
-```
+```bash
 kubectl version --client
 ```
 
 > output
 
-```
+```bash
 Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:13:54Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
 ```