class: center, middle, inverse # Introducción a la Programación I Git intro --- # Agenda - What is a Version Control System? - What is Git? - Git Basics - Github ---  --- # What is a Version Control System? - Version control is a system that records changes to a file or set of files over time so that you can recall specific versions later. - It allows you to: - Revert selected files back to a previous state - Revert the entire project back to a previous state - Compare changes over time - See who last modified something that might be causing a problem, who introduced an issue and when - Recover and more --- # What is Git? - Git (2005) is a free and open source distributed version control system. --- # Other Version Control Systems Other Version Control Systems (CVS, Subversion, and Perforce), they store information on a list of file-based changes. This is called **delta-based** version control.  --- # Git Benefits With Git every time you save the state of the project, Git takes a picture of what all your files look like at that moment and stores a reference to that snapshot. To be efficient, if files have not changed, Git doesn’t store the file again, just a link to the previous identical file it has already stored.  --- # Git can work locally - **Local Operation**: Most operations in Git need only local files and resources to operate. This allows you to work offline and travel with your repository. - **Tracking Changes**: it’s impossible to change the contents of any file or directory without Git knowing about it. --- # Three states: modified, staged, and committed - **Modified** means that you have changed the file but have not committed it to your database yet. - **Staged** means that you have marked a modified file in its current version to go into your next commit snapshot. - **Committed** means that the data is safely stored in your local database. --- # Common Git workflow - You modify files in your working tree. - You selectively stage just those changes you want to be part of your next commit, which adds only those changes to the staging area. - You do a commit, which takes the files as they are in the staging area and stores that snapshot permanently to your Git directory.  --- # GitHub GitHub is a for-profit company that offers a cloud-based Git repository hosting service. Essentially, it makes it a lot easier for individuals and teams to use Git for version control and collaboration. https://github.com  --- # Putting into practice https://learngitbranching.js.org/ Is a game that teaches you how to use Git.