Minor fixes

Author: Petter Graff

labs/02-Publish-And-Subscribe/producer.md

@@ -88,7 +88,14 @@ If you are on a Mac (or in linux), this should work:
    $ docker run -it --rm -v "$(cd "$PWD/../.."; pwd)":/course-root -w "/course-root/$(basename $(cd "$PWD/.."; pwd))/$(basename "$PWD")" -v "$HOME/.m2/repository":/root/.m2/repository maven:3-jdk-11 ./mvnw clean package
    ```
 
-   On a windows machine, you have to replace the `$PWD` with the current directory and the `$HOME` with a directory where you have the `.m2` folder.
+On a Windows machine, the `$PWD` and `pwd` commands may not work (unless you run in a Unix-compliant shell). PWD means `print current directory`. 
+
+The trick we use above is to map the directory two steps down from the current (which is where the labs are installed on your machine). 
+So say you had our labs installed in a directory called `/tmp/MyKafkaLabs`, you are now in the directory `/tmp/MyKafkaLabs/kafka-lab/labs/02-Publish-And-Subscribe`.
+The script `"$(cd "$PWD/../.."; pwd)"` simply out`puts the path two steps down from here, which would be `/tmp/MyKafkaLabs/kafka-lab`. 
+
+The next thing to look out for on a Windows machine is the use of `$HOME`. 
+This simply means your home directory. You can always replace `$HOME` with your home directory.
 
 7. With the producer now built, run it with the following command:
 

labs/04-Implement-Topics-And-Partitions/topics-and-partitions.md

@@ -75,21 +75,31 @@ After a few seconds you should start to see heartbeat messages being produced:
 
 ```
 ...
-Scale 1 sent heartbeat at Sat Jun 17 15:43:06 CDT 2017
-Scale 2 sent heartbeat at Sat Jun 17 15:43:10 CDT 2017
-Heart monitor 2 sent heartbeat at Sat Jun 17 15:43:11 CDT 2017
-Heart monitor 5 sent heartbeat at Sat Jun 17 15:43:13 CDT 2017
-Scale 5 sent heartbeat at Sat Jun 17 15:43:13 CDT 2017
-Scale 6 sent heartbeat at Sat Jun 17 15:43:19 CDT 2017
-Scale 1 sent heartbeat at Sat Jun 17 15:43:21 CDT 2017
-Heart monitor 6 sent heartbeat at Sat Jun 17 15:43:22 CDT 2017
-Heart monitor 1 sent heartbeat at Sat Jun 17 15:43:24 CDT 2017
-Scale 4 sent heartbeat at Sat Jun 17 15:43:24 CDT 2017
-Heart monitor 2 sent heartbeat at Sat Jun 17 15:43:26 CDT 2017
-Heart monitor 7 sent heartbeat at Sat Jun 17 15:43:27 CDT 2017
-Heart monitor 5 sent heartbeat at Sat Jun 17 15:43:28 CDT 2017
-Scale 5 sent heartbeat at Sat Jun 17 15:43:28 CDT 2017
-Scale 6 sent heartbeat at Sat Jun 17 15:43:34 CDT 2017
+2022-08-21T19:20:16.210887Z
+2022-08-21T19:20:16.638141Z
+2022-08-21T19:20:20.24739Z
+2022-08-21T19:20:20.729122Z
+2022-08-21T19:20:23.489956Z
+2022-08-21T19:20:24.938794Z
+2022-08-21T19:20:31.207251Z
+2022-08-21T19:20:33.075107Z
+2022-08-21T19:20:33.705245Z
+2022-08-21T19:20:35.372573Z
+2022-08-21T19:20:35.882868Z
+2022-08-21T19:20:38.202446Z
+2022-08-21T19:20:40.126325Z
+2022-08-21T19:20:46.639412Z
+2022-08-21T19:20:50.373135Z
+2022-08-21T19:20:51.07784Z
+2022-08-21T19:20:53.202233Z
+2022-08-21T19:20:53.491849Z
+2022-08-21T19:21:01.209427Z
+2022-08-21T19:21:01.639625Z
+2022-08-21T19:21:03.074633Z
+2022-08-21T19:21:05.252201Z
+2022-08-21T19:21:06.076764Z
+2022-08-21T19:21:08.203343Z
+2022-08-21T19:21:08.490369Z
 ...
 ```
 
@@ -120,12 +130,18 @@ You should now see a set of output similar to this:
 
 ```
 ...
-Received heartbeat from: Scale 6 value: 2022-02-07T15:47:53.049305Z
-Received heartbeat from: Scale 4 value: 2022-02-07T15:47:56.444218Z
-Received heartbeat from: Heart monitor 7 value: 2022-02-07T15:47:58.672334Z
-Received heartbeat from: Heart monitor 4 value: 2022-02-07T15:48:00.970748Z
-Received heartbeat from: Scale 7 value: 2022-02-07T15:48:01.37685Z
-Received heartbeat from: Heart monitor 3 value: 2022-02-07T15:48:01.400834Z
+Checking devices...
+Finished checking devices...
+Received heartbeat from: Scale 3 value: 2022-08-21T19:21:24.940407Z
+Received heartbeat from: Scale 1 value: 2022-08-21T19:21:31.638733Z
+Received heartbeat from: Heart monitor 4 value: 2022-08-21T19:21:34.757311Z
+Received heartbeat from: Scale 6 value: 2022-08-21T19:21:35.24983Z
+Received heartbeat from: Heart monitor 2 value: 2022-08-21T19:21:35.373978Z
+Received heartbeat from: Heart monitor 1 value: 2022-08-21T19:21:35.726856Z
+Received heartbeat from: Heart monitor 7 value: 2022-08-21T19:21:36.079161Z
+Received heartbeat from: Heart monitor 3 value: 2022-08-21T19:21:46.206831
+ZChecking devices...
+Finished checking devices...
 ...
 ```
 
@@ -144,7 +160,6 @@ For example:
 
 ```
 ...
-Scale 7 offline since Sat Jun 17 16:58:10 CDT 2017
 Scale 7 is back online
 Heart monitor 2 offline since Sat Jun 17 16:59:41 CDT 2017
 Heart monitor 2 is back online