cse15l-lab-reports

CSE 15L Lab 3

Name : Charvi Shukla

Email : cshukla@ucsd.edu

Introduction

Hello! Welcome to my Lab Report 3 - Week 6 for CSE 15L! In this lab report I will be going over the following:

Task 1: Streamlining ssh Configuration

Step 1

For the first step, I created a folder called ssh and created a config file inside it. Then, in Visual Studio Code, I added the following lines into the config file:

Host ieng6
    HostName ieng6.ucsd.edu
    User cs15lsp22adl

Here is a screenshot from VS Code: Image

Step 2

Now, when I go to terminal, I would only need to type in ieng6 to log into ieng6 instead of the entire email address. This would help save a lot of time.

Here is a screenshot from logging in:

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Step 3

In addition, I would now be able to move around files using scp with just typing in ieng6. I created a random file called fileToMove and moved it to ieng6 for the demonstration.

Here is what that looks like:

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Task 2: Setup Github Access from ieng6

Step 1: Creating keys using keygen

On the terminal, I typed ssh-keygen to create a set of private and public keys. They got stored in the .ssh directory.

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Step 2: Copying over the Public Key

Then, I copied the contents of id_rsa_github using the command cat ~/.ssh/id_rsa_github.pub. Then I went on setting on GitHub and added my private key:

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On hitting the Add SSH key button, I was able to see this:

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Step 3: Managing Multiple keys

I added the GitHub information to my config file as well, in order to save time.

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Step 4: PUBLIC KEY LOCATIONS

On GitHub:

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On my device:

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Step 4: Using Git commands

In the next step, I made small edits to markdown-parser.java. Then, via the terminal, I staged the changes with the following command:

git add MarkdownParse.java

Then, I added a commit message:

git commit -m "adding a line"

And, finally, I pushed the changes to GitHub:

git push origin main

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Yay! The changes have now been pushed! click here to view the commit link.

Link to the commit: link

Here is also a screenshot of the commit page:

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Step 5: Repeating with ieng6

I repeated the same steps while being logged into ieng6. That is, I created keys using ssh-keygen and stored them on ieng6. Then i copied over the public key to GitHub and added the SSH key. After doing this, I would be able to use git commands while being logged into ieng6.

Generating keys and copying the public key:

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STEP 7: Using git commands while logged into ieng6

Step 1: I first created a new repository called Lab_report3

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Step 2: Then i used the touch command to make a random markdown file in that repository. Then I used the git add and git commit m- commands to stage and commit the markdown file.

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Step 4: I finally pushed the changes to github. To do so, I had to create a gpg authentication key. Here is the screenshot of pushing

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Step 5: commit link:

link

Task 3: Copying whole directories with scp -r

Instead of copying each file in a directory one by one, using scp -r enables the user to be able to copy the entire directory at a time.

For this lab report, i will be copying over markdown_parse_2 to ieng6 using the following command.

Step 1: Copying files

I used the following command to copy the directory over:

$ scp -r . ieng6:~/markdown_parser_2

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Step 2: Running the tester file

In order to run the tests, I first compiled the test file using:

javac -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar MarkdownParseTest.java

And then, I ran the test file using:

java -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar org.junit.runner.JUnitCore MarkdownParseTest

All the tests passed, and the terminal looked like this:

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Step 3: combining scp, ;, and ssh to copy the whole directory and run the tests in one line

Before starting on this part of the lab report, i deleted the existing markdown_parser_2 version on ieng6 using rm -r markdown_parser_2.

To combine copying, going into ieng6 and running files into a single command, the following components need to be appended using a semicolon (;)

  1. Location of markdown_parser_2 on my computer: /Users/charvieshukla/documents/GitHub/markdown_parser_2

  2. Location of markdown_parser_2 on the remote server: ieng6:~/markdown_parser_2; ssh ieng6 cd markdown_parser_2;

  3. Compiling the test file: javac -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar MarkdownParseTest.java;

  4. Running the test file: java -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar org.junit.runner.JUnitCore MarkdownParseTest`

Therefore, I used the following command on the terminal:

scp -r /Users/charvieshukla/documents/GitHub/markdown_parser_2 ieng6:~/markdown_parser_2; ssh ieng6 cd markdown_parser_2; javac -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar MarkdownParseTest.java; java -cp .:lib/junit-4.13.2.jar:lib/hamcrest-core-1.3.jar org.junit.runner.JUnitCore MarkdownParseTest

Here are screenshots of the command and the output:

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Conclusion

This concludes my Lab report 3. Thank you for reading!

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