completed upto lab 38

lab-environment/enter-lab.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+export KUBECONFIG=/opt/cks-lab/kubeconfig
+expected_context=kind-cks-lab
+context="$(kubectl config current-context 2>/dev/null || true)"
+
+if [[ "$context" != "$expected_context" ]]; then
+  echo "Safety check failed: expected $expected_context, got ${context:-none}." >&2
+  exit 1
+fi
+
+echo "CKS lab: $(kubectl version --output=json | jq -r .serverVersion.gitVersion)"
+echo "Context: $context"
+required_tools=(kubectl kube-bench nano vim curl wget jq yq dig nc ss ps less)
+missing_tools=()
+for tool in "${required_tools[@]}"; do
+  command -v "$tool" >/dev/null 2>&1 || missing_tools+=("$tool")
+done
+if (( ${#missing_tools[@]} )); then
+  echo "Lab setup incomplete; missing: ${missing_tools[*]}. Run ./02-install-and-build.ps1." >&2
+  exit 1
+fi
+echo "Tools: ready (nano, curl, wget, jq, yq, dig, nc, tcpdump, ss); alias k=kubectl"
+exec bash