diff --git a/knowledge base/helm.md b/knowledge base/helm.md
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+++ b/knowledge base/helm.md	
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+# Helm
+
+1. [TL;DR](#tldr)
+
+## TL;DR
+
+```sh
+# List installed plugins.
+helm plugin list
+helm plugin ls
+
+# Install new plugins.
+helm plugin add https://github.com/author/plugin
+helm plugin install path/to/plugin
+
+# Update installed plugins.
+helm plugin update plugin-name
+helm plugin up plugin-name
+
+# Uninstall plugins.
+helm plugin rm plugin-name
+helm plugin remove plugin-name
+helm plugin uninstall plugin-name
+```
diff --git a/knowledge base/helmfile.md b/knowledge base/helmfile.md
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+++ b/knowledge base/helmfile.md	
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+# Helmfile
+
+1. [TL;DR](#tldr)
+
+## TL;DR
+
+```sh
+# Show what happens in the internal computations.
+helmfile --debug -e environment apply
+
+# Show the difference between the current state and what would be applied.
+# Requires `helm` to have the 'diff' plugin installed.
+helmfile
+  -f custom.yml
+  -e environment
+  diff
+    --values environment.yaml
+```