From dca1c0073f42b0d75e914119eae863d6e6087cd6 Mon Sep 17 00:00:00 2001
From: Mateusz Sulima <sulima.mateusz@gmail.com>
Date: Sat, 3 May 2014 12:22:33 +0200
Subject: [PATCH] hello_world.md - $container_id variable case sensitivity

If you run the tutorial step-by-step, following error occurs:

```$ sudo docker logs $container_id
Usage: docker logs CONTAINER
Fetch the logs of a container
  -f, --follow=false: Follow log output```

This is obviously because bash variables are case-sensitive, so it mustn't be `CONTAINER_ID` above.

Docker-DCO-1.1-Signed-off-by: Mateusz Sulima <sulima.mateusz@email.com> (github: github_handle)
---
 docs/sources/examples/hello_world.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/sources/examples/hello_world.md b/docs/sources/examples/hello_world.md
index 48f4a43102..177857816c 100644
--- a/docs/sources/examples/hello_world.md
+++ b/docs/sources/examples/hello_world.md
@@ -80,7 +80,7 @@ continue to do this until we stop it.
 
 **Steps:**
 
-    $ CONTAINER_ID=$(sudo docker run -d ubuntu /bin/sh -c "while true; do echo hello world; sleep 1; done")
+    $ container_id=$(sudo docker run -d ubuntu /bin/sh -c "while true; do echo hello world; sleep 1; done")
 
 We are going to run a simple hello world daemon in a new container made
 from the `ubuntu` image.