Introduction to GIT--version Control

Version Control
Version control allows you to track and
manage all of the changes to your code.
The main benefit of version control is that multiple people could work
on the same project simultaneously. With version control tools like Git,
you can track all of the changes to your code, and in case of any
problems, you could easily revert back to a working state of your source
code.
Installing Git on Windows

In order for you to be able to use Git on your local machine, you would
need to install it.
If you have a Windows PC, you can follow the steps on how to install Git
on Windows here:
Install Git on Windows
During the installation, make sure to choose the Git Bash option, as this
would provide you with a Git Bash terminal which you will use while
following along.
Check Git version
Once you have installed Git, in order to check the version of Git that
you have installed on your machine, you could use the following
command:
git --version
Example output:18
git version 2.25.1
Git Configuration
The first time you set up Git on your machine, you would need to do
some initial configuration.
There are a few main things that you would need to configure:
Your details: like your name and email address
Your Git Editor
The default branch name: is “main” or “master”
We can change all of those things by using the git config command.
Let's get started with the initial configuration!
The git config command
In order to configure your Git details like your user name and your email
address, you need to use the following command:
Configuring your Git user name:
git config --global user.name "Your Name"
Configuring your Git email address:
git config --global user.email [e-mail]
Usually, it is good to have a matching user name and email for your
local Git configuration and your GitHub profile details
Configuring your Git default editor
In some cases, when running Git commands via your terminal, an editor
will open where you could type a commit message, for example. To
specify your default editor, you need to run the following command:
git config --global core.editor nano
You can change the nano editor with another editor like vim or emacs
based on your personal preferences.
Configuring the default branch name
Whenever creating a new repository on your local machine, it gets
initialized with a specific branch name which might be different from
the default branch on GitHub. To make sure that the branch name on
your local machine matches the default branch name on GitHub, you
can use the following command:
git config --global init.defaultBranch main
Finally, once you are done with all changes, you can check your current
Git configuration with the following command:
git config --list
Example output
user.name=Bobby Iliev
user.email=[e-mail]
core.repositoryformatversion=0
core.filemode=true
core.bare=false
core.logallrefupdates=true
The ~/.gitconfig file
As we used the --global command, all of those Global Git settings
would be stored in a .gitconfig` file inside your home directory.
We can use the cat command to check the content of the file:
cat ~/.gitconfig
Example output:
[user]
name = Bobby Iliev
email = [e-mail]
You can even change the file manually with your favorite text editor,
but I personally prefer to use the git config command to prevent any
syntax problems.
The .git directory
Whenever you initialize a new project or clone one from GitHub, it
would have a .git directory where all of the Git commits would be
recorded at and also a config file where the configuration settings for
the particular project would be stored at.
You could use the ls command to check the contents of the .git
folder: ls .git
Output:
COMMIT_EDITMSG HEAD branches config description hooks
index info logs objects refs
Note: Before running the command, you would need to be inside your
project's directory