checks for layout

certificates/essentials/lpi_essentials_lesson_03.md

@@ -73,49 +73,49 @@
 # Lesson 3.3.1
 
 1. The user types the following to their shell:
-```
-$ PATH=~/scripts
-$ ls
-Command 'ls' is available in '/bin/ls'
-The command could not be located because '/bin' is not included in the PATH environment variable.
-ls: command not found
-```
+	```
+	$ PATH=~/scripts
+	$ ls
+	Command 'ls' is available in '/bin/ls'
+	The command could not be located because '/bin' is not included in the PATH environment variable.
+	ls: command not found
+	```
 	* What has the user done?
 	* What command will combine the current value of PATH with the new directory ~/scripts?
 1. Consider the following script. Notice that it is using elif to check for a second condition:
-```
->  /!bin/bash
-
-> fruit1 = Apples
-> fruit2 = Oranges
-
-  if [ $1 -lt $# ]
-  then
-    echo "This is like comparing $fruit1 and $fruit2!"
-> elif [$1 -gt $2 ]
-  then
->   echo '$fruit1 win!'
-  else
->   echo "Fruit2 win!"
-> done
-```
+	```
+	>  /!bin/bash
+	
+	> fruit1 = Apples
+	> fruit2 = Oranges
+	
+	  if [ $1 -lt $# ]
+	  then
+	    echo "This is like comparing $fruit1 and $fruit2!"
+	> elif [$1 -gt $2 ]
+	  then
+	>   echo '$fruit1 win!'
+	  else
+	>   echo "Fruit2 win!"
+	> done
+	```
 	* The lines marked with a > contain errors. Fix the errors.
 1. What will the output be in the following situations?
-```
-$ ./guided1.sh 3 0
-$ ./guided1.sh 2 4
-$ ./guided1.sh 0 1
-```
+	```
+	$ ./guided1.sh 3 0
+	$ ./guided1.sh 2 4
+	$ ./guided1.sh 0 1
+	```
 
 ## Explorational Exercises
 
 1. Write a simple script that will check if exactly two arguments are passed. If so, print the arguments in reverse order. Consider this example (note: your code may look different than this, but should lead to the same output):
-```
-if [ $1 == $number ]
-then
-  echo "True!"
-fi
-```
+	```
+	if [ $1 == $number ]
+	then
+	  echo "True!"
+	fi
+	```
 1. This code is correct, but it is not a number comparison. Use an internet search to discover how this code is different from using -eq.
 1. There is an environment variable that will print the current directory. Use env to discover the name of this variable.
 1. Using what you have learned in questions 2 and 3, write a short script that accepts an argument. If an argument is passed, check if that argument matches the name of the current directory. If so, print yes. Otherwise, print no.
@@ -125,7 +125,6 @@ fi
 ## Guided Exercises
 
 1. Read the contents of script1.sh below:
-
 	```
 	#!/bin/bash
 	
@@ -145,9 +144,7 @@ fi
 	echo "here's your cake!"
 	exit 0
 	```
-
 	* What is the output of these commands?
-
 	```
 	./script1.sh
 	echo $?