The purpose of this lab is to teach the basics of using the Terminal. After you finish this lab, you will be able to manipulate files within your CS account (or any UNIX machine) with ease.
Before starting the lab, please navigate to the Lecture 1 Cheat Sheet to review all the common commands.
Throughout this lab we will give you specific environment parameters and you will have to give the appropriate command to fulfill the action we ask of you. All answers should only contain one primary command (mv, cp, rm, etc.). We will ask you to complete tasks based on a fresh ~/cs190lab2 folder, so it may be wise to be run the "Magic Command" before working on each task.
cd; curl -sL https://raw.githubusercontent.com/PurdueCS190/lab2/master/lab2init | /bin/bash
The command above, when run in a terminal, will create a folder structure (shown below) located within your home directory. Throughout this lab, you will be moving these files around, deleting some, and duplicating others. If at any time you want to reset to the default solder structure, you can run the "Magic Command" again. It will delete the old one and give you a new one to work with.
Below is the folder structure that is generated from running the "Magic Command". It is incorrect (ie. dog sounds in the cat/sounds folder). Throughout this lab, you will write terminal commands that fix some of the mistakes.
cs190lab2/
├── cat/
│ ├── famous cats/
│ │ ├── Garfield
│ │ ├── Grumpy Cat
│ │ └── Tom
│ ├── sounds/
│ │ ├── cat_hiss
│ │ ├── dog_bark
│ │ ├── dog_howl
│ │ └── dog_woof
│ ├── cat_meow
│ └── cat_purr
│
├── dog/
│ ├── famous cows/
│ │ ├── Air Bud
│ │ ├── Blue
│ │ └── Clifford
│ └── sounds/
│
├── fox/
│ ├── famous foxes/
│ │ ├── Fox McCloud
│ │ ├── Pablo the Little Red Fox
│ │ └── Swiper
│ └── sounds/
│ ├── ding
│ ├── ding ding
│ └── ding ding ding
│
└── human/
├── famous humans/
│ ├── Albert Einstein
│ ├── Michael Jordan
│ └── Kirby Kohlmorgen
└── sounds/
├── human_cry
├── human_laugh
└── human_whistle
There are 6 tasks, and you will write 6 one line terminal commands that fulfill that task. Each command may only contain ONE BASE COMMAND (mv, ls, cp, rm, etc). You may not combine different base commands (cd, mv) into one response, and you may not combine two of the same base commands (mv, mv) into one response. Examples of this are below in the Task 0 Example.
All commands should be recorded in answers.txt. To download the answer sheet below, right-click on the file and click "Save File As" and save it to your Downloads folder.
NOTE: Do not save this file within
~/cs190lab2because that folder and all of its contents will be erased each time you run the "Magic Script"
Working Directory: ~/cs190lab2/
Desired Action: print out only the names of the normal folders and files in the cat/ folder and the dog/ folder
Write the answer under the Task 0 block. Make sure not to put '#' before your answer.
# -----------------
# Task 0 Answer
# -----------------
ls cat dog
This above answer is allowed because it is on one line and only contains one base command, which in this case, is a single ls. Example invalid responses are shown below.
# Not allowed response because it is two lines and contains two "ls" commands.
ls cat
ls dog
# Not allowed response because it contains two "ls" commands.
ls cat; ls dog
# Not allowed because it is four lines and contains more than one base command.
cd cat
ls
cd ../dog
ls
Working Directory: ~/cs190lab2/
Desired Action: remove the human/ folder from the working directory
Write the answer under the Task 1 block. Make sure not to put '#' before your answer.
Working Directory: ~/cs190lab2/
Desired Action: create a folder named mouse/ with the subfolders [sounds] and [famous mice]
(may not use MORE THAN TWO path arguments)
(mkdir one/ two/ three/ # this has three path arguments)
Write the answer under the Task 2 block. Make sure not to put '#' before your answer.
Working Directory: ~/cs190lab2/
Desired Action: move the dog sounds from the cat/sounds/ folder to dog/sounds/ folder
(may not explicitly list files in command)
Write the answer under the Task 3 block. Make sure not to put '#' before your answer.
Working Directory: ~/cs190lab2/dog
Desired Action: rename the folder [famous cows] to [famous dogs]
Write the answer under the Task 4 block. Make sure not to put '#' before your answer.
Working Directory: ~/cs190lab2/fox/sounds
Desired Action: copy [ding ding ding] to a new file named [ding ding ding ding]
Write the answer under the Task 5 block. Make sure not to put '#' before your answer.
Working Directory: ~/cs190lab2/cat/sounds
Desired Action: move files that are cat sounds from parent directory (~/cs190lab2/cat)
to the current working directory
(may not use definite paths such as ~/cs190lab2/cat)
Write the answer under the Task 6 block. Make sure not to put '#' before your answer.
That is the last of the tasks. You can raise your hand and get checked off, but please do the Extra\ Fun* sections before you leave.
Did you realize that you made a shell script that is actually runnable? As you saw in the default folder structure, files were all over the place and things were not in the correct locations, nor did they have the correct names. If you have the correct answers, you are able to run your answers.txt file as a script and it will result in a folder structure that makes sense.
If you want to run your answers.txt as a script, run the following command in the terminal:
bash answers.txt
Now look at the entire folder structure of your ~/cs190lab2 folder by running the following command:
ls -al ~/cs190lab2/*/*
View the source of the Magic script. You know almost everything that is going on in this script!
If you want to get a head start on Quiz 2 do it during lab! ** Due Sunday, September 20 at 11:59p **
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Go to Blackboard.
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Login with your career account.
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Go to Fall-2014-CS-19000-TLE under "My Courses."
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Click Quizzes, Quiz 2 - Basic Terminal Commands, Begin.
If you find any bugs within the code or misspellings in the write-up, please tell the TA. Thanks!