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CSE15LSP22 Lab Report 1

By Qingyu Zhu

Tutorial on Remote Server Log-in:

First Step - Installing VScode:

  • Go to VScode Download website to download and install the Visual Studio Code on your computer. -- This is an IDE where you can write code and run commands in its terminal, which is needed for doing remote control.

  • You will see a screen as below once you've installed and opened VScode on your computer. (Make sure to download the version that best fits your computer!)

Image1

Second Step - Remotely Connecting:

  • Open the terminal in VScode (You may also use the one that's originally on your computer).

  • Enter ssh cs15lwi22username@ieng6.ucsd.edu on your command line, where username should be the one you're assigned with.

  • After this, enter your own password and then you will connect successfully! (As below)

Image2

Third Step - Try Some Commands!:

  • Try running more commands on the terminal: cd, ls, pwd, mkdir, ls -a, ls -lat...; -- These are all Linux Commands and you can find more on the Internet.

  • Below are some examples of running these commands:

Image3

Fourth Step - Moving Files with scp:

  • Create a java file on your computer. Then type in the terminal scp filename.java cs15lsp22username@ieng6.ucsd.edu:~/, where filename is the file name of the java file you've created and username is your user name as previous.

  • Log in again to the server using ssh and run command ls, the file would appear in the home directory. Run javac and java on the server:

Image4

Fifth Step - Setting an SSH Key:

  • On your computer, run command ssh-keygen, and when prompted to add a paraphrase, leave it empty, then a private key and a public key are created.

  • Log in to the server and create a .ssh directory with mkdir .ssh.

  • Copy the public key from your computer to .ssh on the server using scp /Users/<user-name>/.ssh/id_rsa.pub cs15lsp22username@ieng6.ucsd.edu:~/.ssh/authorized_keys, where user-name is the name of your computer and username is as previous.

  • Once these are done, you can now log in to the server from your computer without entering your password.

Image5 Image6

Sixth Step - Optimizing Remote Running:

  • (1) Write a command in quotes at the end of a ssh command will run this command directly on the server;

    (2) Add semicolons between commands would let you run multiple commands on one line.

  • Then we can run scp WhereAmI.java cs15lsp22apq@ieng6.ucsd.edu:~/WhereAmI.java and then ssh cs15lsp22apq@ieng6.ucsd.edu "javac WhereAmI.java ; java WhereAmI", which are more convenient.

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