Minor updates to course materials ready for teaching next course

Author: StevenWingett

exercises.md

@@ -107,7 +107,7 @@ Apparently, certain web browser setting cause the archive to unzipped upon downl
 (The `tar` command is useful, as it allows multiple files and the associated file hierarchy to be stored within a single archive file.  You don’t need to understand this command at the moment.)
 
 ### b.
-Explore the `MAZE` folder.  Use `cd` to move around the maze and `ls` to check what is in each room.  Can you find the treasure?
+Go to the `Exercise_3` folder and then explore the `MAZE` folder.  Use `cd` to move around the maze and `ls` to check what is in each room.  Can you find the treasure?
 
 ### c.
 1. In the folder `Exercise_3` you will find a file entitled `poem.txt`.  Write out the contents to the screen using the command `cat`.

presentation.md

@@ -149,7 +149,7 @@ theme: uncover
 
  * We recommend using Bash - arguably the best known
 
- * This is not the LMB cluster default
+ * This is now the LMB cluster default (but didn't used to be)
 
  * Ask scientific computing to make it your default
 
@@ -271,6 +271,19 @@ theme: uncover
 
 ---
 
+## Introducing the Linux filesystem
+* Locations represented as a line of text
+
+* Each folder ends with a forward slash:
+  `/lmb/home/jsmith/file1.txt`
+
+* Relative links:
+  `../pjones/file2.txt`
+  `./file4.txt` 
+  `~/folderA/file5.txt`
+
+---
+
 ## Demo Linux commands and the filesystem
 
     ls
@@ -285,19 +298,6 @@ theme: uncover
 
 ---
 
-## Introducing the Linux filesystem
-* Locations represented as a line of text
-
-* Each folder ends with a forward slash:
-  `/lmb/home/jsmith/file1.txt`
-
-* Relative links:
-  `../pjones/file2.txt`
-  `./file4.txt` 
-  `~/folderA/file5.txt`
-
----
-
 ## Naming files
 
 *  Use only alphanumeric characters, the underscore symbol (_) and the dot (.):

tutor_notes/answers.md

@@ -34,6 +34,8 @@ Version
       `ls -l /usr/bin/who`
 
 3.    `groups`
+   
+`groups [username]`
 
 #### b
 `sort letters.txt > sorted.txt`