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Introduction to Git and Github Dade’ Aderemi http://geekabyte.blogspot.com
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Introduction to git and github

May 11, 2015

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Technology

Aderemi Dadepo

Basic Introduction to Git and Github. Covers the basic work flow of init, clone, add, commit and push. Other commands like git remote, git pull etc are briefly touched.
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Page 1: Introduction to git and github

Introduction to Git and Github

Dade’ Aderemihttp://geekabyte.blogspot.com

Page 2: Introduction to git and github

git Git is an extremely fast, efficient, distributed version control system used for collaborative development of software. Git was designed and developed by Linus Torvalds.

git·hub Github is a web-based hosting service for software development projects that use the Git revision control system. Github was founded by chris wanstrath and tom preston-werner and PJ Hyett.

What is Git and Github

Page 3: Introduction to git and github

Installing Configuring Git with Github Working locally with Github Working remotely with Github

Flow

Page 4: Introduction to git and github

Installing Git is simple. Download and follow the steps of installation.

Find detailed installations:

Linuxhttp://help.github.com/linux-set-up-git/

Windows http://help.github.com/win-set-up-git/

OSX http://help.github.com/mac-set-up-git/

Installing Git

Page 5: Introduction to git and github

Github makes using Git a lot cooler.

Steps to have your Git installed to work with Github is as follows:

1. Generate SSH Key2. Add SSH Key to Github3. Setting up preference and info4. Testing

Configuring Git with GitHUB

Page 6: Introduction to git and github

Generate SSH Key To generate a new SSH key, enter the code below.

Press Enter to go with the default settings.

Now you need to enter a passphrase.

Configuring Git with GitHUB

Page 7: Introduction to git and github

Passphrase is another layer that makes you SSH key more secure. You should see something like this. And a id_rsa.pub file would be created in your working directory.

Configuring Git with GitHUB

Page 8: Introduction to git and github

Add SSH Key To Github Create an account on www.github.com. Login, go to  “Account

Settings” > Click “SSH Keys” > Click “Add another public key”

Open the id_rsa.pub file with a text editor. copy your SSH key exactly as it is written without adding any newlines or whitespace. Now paste it into the “Key” field. Leave the title out. Click Add Key and that is all.

Configuring Git with GitHUB

Page 9: Introduction to git and github

Setting Up Info Git tracks who makes each commit by checking the user’s name and

email. To set these, enter the code below, replacing the name and email with your own. The name should be your actual name, not your GitHub username.

More options include git config --global color.branch auto git config --global color.diff auto

Find more customization options here: http://book.git-scm.com/5_customizing_git.html

Configuring Git with GitHUB

Page 10: Introduction to git and github

Testing setupTo make sure everything is working type the following code.

You should get

Type Yes and you are done!

Configuring Git with GitHUB

Page 11: Introduction to git and github

Creating Projects Navigate into the directory you want to create project

in and run this command

$ git init

Working with Git Locally

Page 12: Introduction to git and github

Adding Files to Staging Area

In Git, you have to add file contents to your staging area before you can commit them

$ git add .(add all files recursively)

$ git add * (add all files)

Working with Git Locally

Page 13: Introduction to git and github

Checking Status of project See what the status of your staging area is compared to

the code in your working directory, you can run the git status command

$ git status$ git status –s (non-verbose)

Working with Git Locally

Page 14: Introduction to git and github

Committing Changes Run this command to actually record snapshot that

has been added. Git records your name and email address with every commit you make.

Every commit should be accompanied by a message which describes what the commit is about. You specify this with ‘-m’ flag.

Working with Git Locally

$ git commit -m ‘first commit‘

Page 15: Introduction to git and github

Branch Command The git branch command is a general branch

management tool for Git. A git branch is basically the context in which you currently work. To create a new branch run

$ git branch [branchname](creates a branch)

$ git branch(lists existing branch)

When you run git init, a ‘master’ branch is automatically created.

Working with Git Locally

Page 16: Introduction to git and github

So far, we have been working with Git on a local system. To put your project up on GitHub, you’ll need to have a GitHub repository for it to live in. Follow the following steps.

Login into Github and click on New Repository

Working remotely with Github

Page 17: Introduction to git and github

Proceed to fill the form to create a new repository.

Working remotely with Github

Page 18: Introduction to git and github

Each Repository has a unique URL. This would be needed when you want to move your files to github. Go to the Repository page and you would find the URL as similar as below:

Working remotely with Github

Page 19: Introduction to git and github

Adding a remote repository and alias If you want to share a locally created repository to

github it is generally easiest to add it as a remote on your local machine. Git stores an alias or nickname for each remote repository URL So that you don't have to use the full URL of a remote repository every time you want to synchronize with it. To add a remote use the remote add command

$ git remote add [alias] [url]alias = Name you want to refer to the remote eg origin, project etcurl = unique url of the remote repository.

Example git remote add origin [email protected]:dadepo/Padly.git

Working remotely with Github

Page 20: Introduction to git and github

Copying a Git Repository with Clone If you need to collaborate with someone on a project, or if you

want to get a copy of a project so you can look at or use the code, you will clone it. To do this run the following command:

$ git clone [url]

url = unique url of the remote repository.

For example to clone a repository at [email protected]:dadepo/Padly.git you type

git clone [email protected]:dadepo/Padly.git

Working remotely with Github

Page 21: Introduction to git and github

Updating from a remote repository Git has two commands to update itself from a remote repository. 

git fetchgit pullThe difference in these two commands in the simplest terms is that, "git pull" does a "git fetch" followed by a "git merge".

Working remotely with Github

Page 22: Introduction to git and github

Updating a remote repository To update a remote repository with changes you have made

locally you run the following command

git push [alias] [branch]

 * If someone else has pushed since you last fetched and merged, the Git server will deny your push until you are up to date.

Working remotely with Github

Page 23: Introduction to git and github

http://help.github.com/http://learn.github.com/p/intro.htmlhttp://gitref.org/index.html

More Resources on Git