Git

• Git is a version control system that is used for software development and other version control tasks.
• A repository to backup files and to update the files. So, you can use it later for restore or update.
• You probably had a experience that you updated some shared filed and replace it, but actually you erased all the parts which others made updates. This is a common situation during working on a software development as a team.
• If you use Git, it will ask you whether you really want to replace the file when there is an updated file by others.

Repository

• Remote repository: files are managed by remote repository server, and this is for sharing with others.
• Local repository: personal repository that file is saved on my PC .

Creating Repository

• You can either create a brand new repository from scratch or by cloning an existing remote repository onto your local machine.

Commit

• The “commit” operation enables you to record changes that were made to a file or directory in the Git history.
• By commiting every change made, you will be able to view all changes chronologically in the respective file or directory.

Working Tree and Index

• A “working tree” consist of files that you are currently working on.

• An “index” is a staging area where new commits are prepared. It acts as the interface between a repository and a working tree.

• Changes made on the working tree will not be commited directly to the repository. They need to be staged on the index first

Git Hub vs. Git Lab

GitHub

• suitable for OpenSource project
• extra fee is needed for private repository, not suitable for personal project.

GitLab

• free for using private repository.
• If you pay extra, you can get technical support as well.

Citation

Images and most of words are from the website below

• https://backlogtool.com/git-guide/en/