id: path
title: File Paths
image: base
instruction: |
  In this quest, you will learn:
  1. Absolute and relative paths
  2. How to show your current path with `pwd`

requirements:
  - explore

stages:
  - id: start
    name: Click `Start` to begin the lesson
    condition:
      command: echo start
    response:
      content: |
        In Linux, a path describes the location of a file or folder.
        Paths can be relative or absolute.
        A relative path starts from your current folder. An absolute path starts from the root folder.
        First, use `ls` to list the files in this folder.

  - id: ls
    name: List the files in the folder
    requirements:
      - start
    condition:
      pwd: /home/commander
      command: ls
    response:
      content: |
        Now use `cd` to enter the `folder1` folder.

  - id: cd-folder1
    name: Enter `folder1`
    requirements:
      - ls
    condition:
      pwd: /home/commander/folder1
    response:
      content: |
        You have entered `folder1`.
        In `cd folder1`, the `folder1` part is a relative path.
        Likewise, `..` in `cd ..` is a relative path.
        A relative path can span more than one level of folders.
        For example, to enter `folder2` from here, you could use `cd ..` to go up one level, then `cd folder2` to enter it.
        You can also join `..` and `folder2` with `/` and enter `cd ../folder2` to get there in one command.
        Try entering `folder2` this way.
      hint: Enter `cd ../folder2` to move into `folder2`.

  - id: cd-folder2
    name: Enter `folder2`
    requirements:
      - cd-folder1
    condition:
      pwd: /home/commander/folder2
    exceptions:
      - id: not_in_folder2
        condition:
          pwd: /home/commander
        response:
          content: Enter `cd folder2` to move into `folder2`
    response:
      content: |
        You have entered `folder2` using a relative path.
        You can also add a relative path after `ls` to list the contents of another folder.
        For example, use `ls ../folder1` to see which files are in `folder1`.
        Try listing the files in `folder1` this way.
      hint: Enter `ls ../folder1` to list the files in `folder1`.

  - id: ls-folder1
    name: List the files in `folder1`
    requirements:
      - cd-folder2
    condition:
      output: file1.txt
    exceptions:
      - id: not_in_folder2
        condition:
          not:
            pwd: /home/commander/folder2
        response:
          content: Return to `folder2` with `cd ~/folder2`, then use `ls ../folder1` to list the contents of `folder1` without leaving `folder2`.
    response:
      content: |
        Great! You now know how to use relative paths.
        Next, let's look at absolute paths.
        An absolute path starts from the root folder, which is at the top of the file tree.
        Use `pwd` to display the absolute path to your current folder.
        `pwd` stands for `print working directory`: it displays the path to the folder you are in.
        Now use `pwd` to display your current absolute path.
      hint: Enter `pwd` to display your current absolute path

  - id: pwd
    name: Display your current absolute path
    requirements:
      - ls-folder1
    condition:
      pwd: /home/commander/folder2
      command: pwd
    exceptions:
      - id: not_in_folder2
        condition:
          not:
            pwd: /home/commander/folder2
        response:
          content: Return to `folder2`, then use `pwd` to display your current absolute path
    response:
      content: |
        Your current absolute path is `/home/commander/folder2`.
        The command prompt also shows your current location.
        In `commander:~/folder2 $`, `~/folder2` is a shortened form of the path to your current folder.
        `~` stands for `/home/commander`, your home folder. Each game starts here.
        You can use absolute paths with `ls` and `cd` too.
        For example, use `ls ~` to list your home folder or `cd ~` to return to it.
        Now use `ls ~` to list the contents of your home folder.
      hint: Enter `ls ~` to list the contents of your home folder

  - id: ls_home
    name: List the contents of your home folder
    requirements:
      - pwd
    condition:
      command: ls ~
    response:
      content: |
        Now use `cd ~` to return to your home folder.
      hint: Enter `cd ~` to return to your home folder

  - id: END
    name: Return to your home folder
    requirements:
      - ls_home
    condition:
      command: cd ~
    exceptions:
      - id: already_home
        condition:
          pwd: /home/commander
        response:
          content: Use `cd ~` to return to your home folder
    response:
      content: |
        You have returned to your home folder.
        Congratulations! You now know how to use absolute and relative paths and display your current absolute path.