---
title: "Intro to git"
sub_title: "git push -f origin main"
author: "Prabuddha Hans"
date: "2025-09-22"

theme:
    name: catppuccin-latte
---

Git
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* Git is tool that's used in the programming industry.
* Another name for Git is a Version Control System (VCS) tool.
* Specifically to track project work done, and the changes to files we've made.
* The more correct term is Source Control.
* It is NOT a programming language.
* Git is a tool made for (usually) us programmers to track the work we've done.

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Programmer socks (not) included.

![image:width:100%](intro_to_git/compsocks.png)

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Why Git
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* Now we need to ask WHY.
* Why would we need a tool like this?
* Why not use Google Drive instead?
* I will find your IP address.
* In all honesty,
* It's to help keep track of who did what.
* And to work on unique features...
* without affecting the main area/branch of our work.
* When DO we use git?
* Because Git keeps track of the changes we've made to files,
* We can then use it to commit and stage these files,
* and push them to a place where we can store them.
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Code Storage
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* This place is called a Repository.
* Repositories are hosted on websites like GitLab, GitHub and Forgejo.
* But, an interesting feature of git, is that it allows you to time-travel.
* Meaning that if a project breaks, you can go back to before it broke.
* Now I hear you nerds in the audience asking...
* Why not use SVN?
* The answer is simple.

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No.
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![image:width:100%](intro_to_git/NAH.jpg)

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WHY don't we use SVN
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* An actual answer is that Git is Distributed, and SVN in centralized.
* Simply put, devs can store their changes locally on their machines.
* Whereas on SVN they're stored on a central system.
* With a central system you NEED to be connected at all times to work on it.
* You can work locally on git without having to be connected,
* and then push once you're reconnected.
* Back to git.
* Let's start with the basics.

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Live demonstration time
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* Please get your laptops out

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How to download Git & Git LFS
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## Download
<<https://git-scm.com/downloads>>

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![image:width:100%](intro_to_git/git_download_button.png)

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![image:width:100%](intro_to_git/git_installer.png)

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![image:width:100%](intro_to_git/git_installer_notepad_as_default_editor.png)

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![image:width:100%](intro_to_git/git_installer_rename_master_to_main.png)

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![image:width:100%](intro_to_git/git_installer_checkout_unix.png)

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![image:width:100%](intro_to_git/git_installer_default_rebase_pull.png)

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<<https://forgejo.skynet.ie/Skynet/deploy_user>>

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Don't do these types of commit messages
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![image:width:100%](intro_to_git/bad_message.png)

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![image:width:100%](intro_to_git/forgejo_template_button.png)

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![image:width:100%](intro_to_git/forgejo_template_repo_creation.png)

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![image:width:100%](intro_to_git/forgejo_repo_link.png)

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LFS Install

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````bash 
git lfs install
````

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Setup SSH key (see Readme.md)
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![image:width:100%](intro_to_git/forgejo_repo_settings.png)

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![image:width:100%](intro_to_git/forgejo_secrets_location.png)

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![image:width:100%](intro_to_git/forgejo_add_secret.png)

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![image:width:100%](intro_to_git/forgejo_ssh_key_example.png)

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````bash
git init
git remote add origin <repo_url>
git pull origin <branch_name>
git add <file_name>
git commit -m "<commit_message>"
git push origin <branch_name>
````

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``https://<username>.users.skynet.ie/``

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TroubleShooting
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If you see this:
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![image:width:100%](intro_to_git/permission_denied_publickey.jpg)

> Credit: Geeks for Geeks

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Go here
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https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

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