DEV Community: Khadija Umar Danhassan

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Khadija Umar Danhassan — Wed, 25 Jun 2025 23:11:30 +0000

Rita {FlyNerd} Lyczywek

Jun 17 '25

You’ve got Chat instead of a brain: how AI is messing up junior developers

#discuss #programming #beginners #chatgpt

Comments 6

5 min read

/efi/boot filled up - quick fix

Khadija Umar Danhassan — Sun, 15 Jun 2025 16:36:35 +0000

So I recently dual-booted Ubuntu to Windows on my HP laptop, and I loved the change for my development (java). Ubuntu is smooth, flexible and generally works great without too much lag.

EFI SURPRISE!

About a week ago I got a pop up message when I logged on to Ubuntu

''' Low Disk Volume on "efi" '''

I had no idea what efi was and why there was such low disk volume on it, but it didn't sound positive, low anything never sounds positive.
So I put on my thinking hat, and deep dived into the world of web resarch. Most resources suggested increasing /boot/efi space by booting from a Live USB and using tools like GParted to resize partitions, or worse — reinstalling Ubuntu. Neither of these were options for me at the time.

So I did what any confused dev with no guru to guide them would do, I consulted the OG chatgpt! BUT WITH A BADASS PROMPT FROM aiforwork.co

1. Checking/confirming /efi/boot space

To check the available space, I ran these commands:

df -h /boot/efi
sudo du -sh /boot/efi/*

And yes my disk was indeed full:

2. Diagnosing what's taking up space

I ran a few more commands recommended by my OG (chatgpt)

sudo tree /boot/efi/EFI -L 3
sudo du -sh  /mnt/EFI/*

These came back with permisson errors or missing directories messages. My OG said:

At this point I was alarmed. Most of the options my OG gave me involed an external disk to fix the internal problem, I just didn't have this luxury at the time, which led me to the next step.

3. Manually deleting files/folders to create space

Instead of finding a disk or some complicated partition tool, I decided to delete things I didn't need,from analysis HP/Microsoft took most of the space, so I moved to the Microft folder and removed unnecessary language packs:

cd /boot/efi/EFI/Microsoft/Boot
ls -d */ | grep -E '[a-z]{2}-[A-Z]{2}'
sudo rm -r en-GB fr-FR et-EE de-DE  # replace with what you see

Got some space freed! Took it a step further and also deleted BIOSUpdate (also not essesntial).

cd /boot/efi/EFI/HP
ls -lh
sudo rm -r BIOSUpdate

Then I got more free space!! I ran the df command again to check for disk usage, and it dropped to this^^ super proud

Wrapping it up

Don't panic, don't wipe your system. With a little guidance and the right terminal commands, you can repair EFI safely and reclaim your boot partition without needing a Live USB.

I hope this helps. Don't forget to check the man pages for the usage of the commands above. For more experienced devs if you have further explanation on how to fix this issue even more, do let me know. Thank you

Polymorphism in Java

Khadija Umar Danhassan — Tue, 03 Jun 2025 17:23:57 +0000

Packages In Java

Khadija Umar Danhassan — Sun, 25 May 2025 09:58:36 +0000

I was recently compiling a .java file in VS Code and noticed something odd: the file wouldn't run. No matter how many times I clicked the "Run" button, it just wouldn't behave — unless I dove into the terminal and ran with this command:

java FileName.java

Here is my file structure:

To run java files, VScode needs to set up a json configuration launch.json in the particular folder you run your java files from. If it is not present in that folder, then VScode has some difficulty running it when you click on "Run", unless you include this:

package FolderName;

So, to make things run with the "Run" button in VS Code, I added this at the top of my Java file:

package Udemy_Java_for_Noobs;

This tells Java that the file belongs in a folder named exactly Udemy_Java_for_Noobs and it runs it easy peasy. But here's where the issue kicks in

The Issue

If someone else clones my repo — or if you move the file into a different folder — that package declaration can break everything. Suddenly, the compiler complains that it can't find the class, or the folder structure doesn't match.

I realized I didn’t want people to go through that hassle, especially if they're beginners or using any environment that doesn't automatically set up a launch.json.

The Solution

To solve this, I removed the package line completely.

// No package, no problem
public class FileName {
    public static void main(String[] args) {
        System.out.println("Clean and simple.");
    }
}

Now the file runs from anywhere. Just compile and run like this:

javac FileName.java
java FileName

No special folder names. No config headaches. Just Java doing Java things.

Final Thoughts

If you're building something big or working on a team? Use packages — they're useful for organizing code.

But if you're writing small Java projects, examples, or just trying to share code that runs anywhere — skip the package and keep it portable.

Hope this helps someone avoid the same confusion I ran into. Happy coding! 🧑‍💻

Here is the repo for anyone interested.

magadjiya / udemy_javafornoobs

JAVA FOR NOOBS

This repository contains practice examples from the Java For Noobs course. It aims to demonstrate basic Java syntax and concepts through hands-on examples. Topics covered include:

Implementing conditional statements: if, else if, else, and switch
Utilizing loops: while and for
Grasping Object-Oriented Programming (OOP) principles
Creating classes, objects, and methods
Data Structure - linked lists
Developing problem-solving skills using Java

This repo also includes a final project to showcase full understanding of the topics covered: To Do List using linked list data structure.

📘 Click here to view the course on Udemy

🧪 Practice Problems

This repository contains practice problems that align with the concepts covered in the course. Each problem is designed to reinforce understanding and provide hands-on experience.

🗂️ General Logic Problems

Problem Set 1 Problem1.java
Problem Set 2 Problem2.java
Problem Set 3 Problem3.java
Problem Set 4 Problem4.java
Problem Set 5 Problem5.java
…

View on GitHub