Update cheatsheets

k9s

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# k9s
+
+> View and manage Kubernetes clusters.
+> More information: <https://k9scli.io/topics/commands/>.
+
+- Manage a cluster using a kubeconfig context:
+
+`k9s --context {{kubeconfig_context_name}}`
+
+- Manage a cluster in read-only mode (disabling all commands that may cause modifications):
+
+`k9s --readonly --cluster {{cluster_name}}`
+
+- Manage a cluster using a given kubernetes namespace:
+
+`k9s --namespace {{kubernetes_namespace}} --cluster {{cluster_name}}`
+
+- Manage a cluster launching k9s in the pod view and enable debug logging:
+
+`k9s --command {{pod}} --logLevel debug --cluster {{cluster_name}}`