seed: curriculum content

1.solar-system/1.welcome/02.hello-world/index.md

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+---
+type: challenge
+title: "Hello, World"
+xp: 25
+duration: 15
+difficulty: 1
+---
+
+# Hello, World
+
+> **[INCOMING — Mission Control, Earth]**
+>
+> Cadet, first signal. Write a script that creates `hello.txt`
+> containing exactly:
+>
+> ```
+> Hello, World
+> ```
+>
+> Two commands:
+>
+> - `echo` prints text
+> - `>` redirects what would print into a file
+>
+> [END TRANSMISSION]
+
+## Your Task
+
+In `starter/starter.sh`, write the command(s) that create `hello.txt`
+with the content `Hello, World`.
+
+## Objectives
+
+- `hello.txt` exists in the working directory
+- File contents match `Hello, World` exactly

1.solar-system/1.welcome/02.hello-world/starter/starter.sh

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+#!/bin/bash
+# Hello, World — your first script.
+# Write the line "Hello, World" into a file called hello.txt
+# in the current directory.
+
+# Your code here.

1.solar-system/1.welcome/02.hello-world/testing/test.sh

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+#!/bin/bash
+bash solution.sh > /dev/null 2>&1
+
+if [ -f hello.txt ]; then
+  echo "ok 1 - hello.txt is created"
+else
+  echo "not ok 1 - hello.txt is created"
+fi
+
+ACTUAL=$(cat hello.txt 2>/dev/null)
+ACTUAL="${ACTUAL%$'\n'}"
+if [ "$ACTUAL" = "Hello, World" ]; then
+  echo "ok 2 - hello.txt contains 'Hello, World'"
+else
+  echo "not ok 2 - hello.txt contains 'Hello, World'"
+fi