{
  "id": "linux-filesystem-navigation",
  "title": "Build a Real Project Directory Structure",
  "category": "Linux Fundamentals",
  "isolation_type": "shared_namespace",
  "difficulty": "Easy",
  "type": "task",
  "weight": 3,
  "description": "## Build a Real Project Directory Structure\n\nEvery real codebase has a directory structure that means something. Practice building and navigating one.\n\n**Your task:**\n\nUnder `/srv/fs-lab/`, create:\n\n1. A directory tree: `project/src`, `project/docs`, `project/tests`\n2. A hidden file at `project/.config` containing exactly the text `ready`\n3. Navigate into `project/src` using a RELATIVE path from `/srv/fs-lab` (not an absolute path) to confirm you understand `cd project/src` vs `cd /srv/fs-lab/project/src`",
  "hints": [
    {
      "title": "Creating the tree in one command",
      "body": "`mkdir -p` creates every intermediate directory in one call, and brace expansion lets you create three siblings at once.",
      "command": "mkdir -p /srv/fs-lab/project/{src,docs,tests}\necho -n 'ready' > /srv/fs-lab/project/.config"
    }
  ],
  "setup_commands": [
    { "command": "mkdir -p /srv/fs-lab" }
  ],
  "validation": {
    "commands": [
      { "description": "project/src exists", "command": "[ -d /srv/fs-lab/project/src ] && echo yes", "expected_output": "yes", "match": "exact" },
      { "description": "project/docs exists", "command": "[ -d /srv/fs-lab/project/docs ] && echo yes", "expected_output": "yes", "match": "exact" },
      { "description": "project/tests exists", "command": "[ -d /srv/fs-lab/project/tests ] && echo yes", "expected_output": "yes", "match": "exact" },
      { "description": "hidden .config file has the right content", "command": "cat /srv/fs-lab/project/.config", "expected_output": "ready", "match": "exact" }
    ]
  },
  "default_namespace": "default",
  "teardown_commands": [
    { "command": "rm -rf /srv/fs-lab" }
  ]
}