GITHUB

GitHub is a web-based platform for version control and collaboration that is built on top of the Git version control system. It is a code hosting platform that allows users to store and share their code with others. GitHub provides a wide range of features for managing code repositories, including:
1. Version control: GitHub allows users to create and manage Git repositories, which provides version control for their code.
2. Collaboration: Users can invite others to collaborate on their code, allowing multiple people to work on the same codebase simultaneously.
3. Code review: GitHub allows users to review and comment on code changes made by others, making it easier to catch errors and improve the quality of the code.
4. Issue tracking: GitHub provides tools for tracking issues, bugs, and feature requests, making it easier for teams to prioritize and manage their work.
5. Continuous integration and deployment: GitHub provides tools for continuous integration and deployment, allowing teams to automate their software development workflows.
GitHub has become an essential tool for software developers and teams, enabling them to work together more effectively and efficiently. It also serves as a hub for open-source software development, providing a platform for developers to share their code with the world and collaborate on projects with others.

To connect to GitHub from CentOS 7, you will need to perform the following steps:

1. Install Git: You can install Git on CentOS 7 by running the following command:
# sudo yum install git
2. Generate an SSH key: Before you can connect to GitHub, you will need to generate an SSH key. You can do this by running the following command:
# ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
Be sure to replace "your_email@example.com" with your own email address.
3. Add your SSH key to GitHub: Once you have generated your SSH key, you will need to add it to your GitHub account. You can do this by following these steps:

•  Log in to your GitHub account
•  Click on your profile picture in the top-right corner of the screen and select "Settings"
•  Click on "SSH and GPG keys" in the left-hand menu
•  Click on "New SSH key"
•  Give your key a title (such as "CentOS 7 SSH key") and paste in the contents of your public key (which can be found in ~/.ssh/id_rsa.pub)

4. Test your connection: Once you have added your SSH key to GitHub, you can test your connection by running the following command:
# ssh -T git@github.com
If your connection is successful, you should see a message that says "Hi username! You've successfully authenticated, but GitHub does not provide shell access."
That's it! You should now be able to connect to GitHub from CentOS 7 using SSH.

To create a new blog and push it to GitHub without copying code, follow these steps:

1 Create a new directory for your blog and navigate into it

# mkdir my-blog && cd my-blog

2 Initialize a new Git repository in the directory

# git init

3 Add a remote repository on GitHub for your blog:

# git remote add origin https://github.com/your-username/my-blog.git

4 Create your blog files and add them to the Git staging area

# git add .

5 Check the status of the repository to make sure everything is staged

# git status

6 Commit the changes to the repository with a message

#git commit -m 'Initial commit'

7 Push the changes to the remote repository on the master branch

# git push origin master

8 View the commit history of the repository

# git log

When you push changes to the remote repository, Git will prompt you for your GitHub username and password. To avoid entering your password every time you push changes, you can generate a personal access token in your GitHub account settings and use it instead of your password. To generate a token, follow these steps:

1 Log in to your GitHub account and navigate to your account settings.
2 Click on "Developer settings" in the left-hand sidebar.
3 Click on "Personal access tokens" in the left-hand sidebar.
4 Click on the "Generate new token" button.
5 Give your token a name and select the scopes you want it to have access to.
6 Click on the "Generate token" button.
7 Copy the token and use it as your password when prompted by Git.

To use an existing Git repository on CentOS 7, you can follow these steps:

1. Clone the repository: The first step is to clone the existing Git repository to your CentOS 7 system. You can do this by running the following command:

# git clone <repository_url>

Replace <repository_url> with the URL of the repository that you want to clone. This URL can be found on the GitHub website by clicking the "Clone or download" button.

2. Change into the repository directory: Once you have cloned the repository, change into the directory using the cd command:

# cd <repository_name>

Replace <repository_name> with the name of the directory that was created when you cloned the repository.

3. Make changes to the code: You can now make changes to the code in the repository using your preferred text editor.

4. Add and commit changes: Once you have made changes to the code, you will need to add and commit the changes to the repository. You can do this using the following commands:

# git add .

This will add all of the changes to the staging area.

# git commit -m "Commit message"

This will commit the changes to the repository.

5. Push changes to GitHub: Finally, you will need to push the changes to GitHub using the following command:
# git push origin master

This will push the changes to the master branch of the repository on GitHub.
That's it! You have now used an existing Git repository on CentOS 7 and made changes to the code.