IT 244: Introduction to Linux/Unix

IT 244: Introduction to Linux/Unix
Homework 10

Due

Sunday, April 14th at 11:59 PM

What You Need to Do

Create the script hw10.sh with Unix commands that will do what is described in the steps below
This file must be in an hw10 directory under your hw directory

Setup

From your home directory go to your it244 directory
```
cd it244
```
Go to your hw directory
```
cd hw
```
Create an hw10 directory
```
mkdir hw10
```
Enter this new directory
```
cd hw10
```
Create hw10.sh
```
nano hw10.sh
```

Specification

Create the file hw10.sh inside your hw10 directory using nano
Write the Unix command to perform the action specified by each step
Be sure to write a Step comment before the Unix commands for each step

On a single line, create the following variables with the values given.
- Variable a with the value 5
- Variable b with the value 3
On another single command line, create the following variables with the values given.
- Variable s1 with the value "foo"
- Variable s2 with the value "foo"
- Variable s3 with the value "bar"
Print all variables and their values to the terminal.
Write a test expression that returns a value indicating true or false when testing whether a is equal to b.
Echo the results of this test to the terminal.
Write a test expression that returns a value indicating true or false when testing whether a is less than b.
Echo the results of this test to the terminal.
Write a test expression that returns a value indicating true or false when testing whether a plus b is greater than 9.
Echo the results of this test to the terminal.
Write a test expression that returns a value indicating true or false when testing whether s1 is equal to s2.
Echo the results of this test to the terminal.
Write a test expression that returns a value indicating true or false when testing whether s1 is not equal to s3.
Echo the results of this test to the terminal.
Write a test expression that returns a value indicating true or false when testing whether s1 has a length greater than 0.
Echo the results of this test to the terminal.
Do the following
- Copy the directory dir1 from ~ghoffman/course_files/it244_files to your hw10 directory
- Copy the file empty.txt from ~ghoffman/course_files/it244_files to your hw10 directory
- Run a command to show the permissions on the contents of your hw10 directory
Write a test expression that returns a value indicating true or false when testing whether dir1 is a directory.
Echo the results of this test to the terminal.
Write one test expression that returns a value indicating true or false when testing whether empty.txt is readable and is writeable.
Echo the results of this test to the terminal.

Testing

There are two tests that your should run on your script
The first test checks for Unix errors
Run bash on your script like this
```
bash hw10.sh > /dev/null
```
This will run your script but will only show error messages
If you see nothing, your script has passed this test
The second test checks your Step comments

Run it like this

~ghoffman/code/it244_code/testing_scripts_it244/step_comment_check.sh

If your Step comments are wrong you will lose points