Add kubectl shell autocompletion section

docs/getting-started-guides/kubectl.md

@@ -63,4 +63,45 @@ brew install kubectl
 ```
 
 The homebrew project is independent from kubernetes, so do check that the version is
-sufficiently up-to-date using `kubectl version`.
+sufficiently up-to-date using `kubectl version`.
+
+
+# Enabling shell autocompletion
+
+kubectl includes autocompletion support, which can save a lot of typing!
+
+The completion script itself is generated by kubectl, so you typically just need to invoke it from your profile.
+
+Common examples are provided here, but for more details please consult `kubectl completion -h`
+
+## On Linux, using bash
+
+To add it to your current shell: `source <(kubectl completion bash)`
+
+To add kubectl autocompletion to your profile (so it is automatically loaded in future shells):
+
+```shell
+echo "source <(kubectl completion bash)" >> ~/.bashrc
+```
+
+## On MacOS, using bash
+
+On MacOS, you will need to install the bash-completion support first:
+
+```shell
+brew install bash-completion
+```
+
+To add it to your current shell:
+
+```shell
+source $(brew --prefix)/etc/bash_completion
+source <(kubectl completion bash)
+```
+
+To add kubectl autocompletion to your profile (so it is automatically loaded in future shells):
+
+```shell
+echo "source $(brew --prefix)/etc/bash_completion" >> ~/.bashrc
+echo "source <(kubectl completion bash)" >> ~/.bashrc
+```