![]() ![]() Statistically speaking, the SHA-1 value is unique for a given piece of content. This 40-character hexadecimal string is the result of a mathematical computation based on the content. Git IDs are what's known as secure hash algorithm 1 or SHA-1 values. That string is the name of a Git commit object. For example, source tree shows the 40-character commit IDs with the commit details. You commonly see these Git IDs as you work with Git. These strings are commonly known as Git IDs, but they are also known as object IDs, SHA-1, hashes and checksums. All of the objects stored by Git are named with a 40-character hexadecimal string. Git keeps these objects internally in something called the object store but you typically don't directly interact with the object store. A typical Git user may only interact with commit objects and tags, letting Git worry about the details related to trees and blobs. A blob is an object that stores the content of a file that is being managed by Git. A tree is an object that contains a list of the file names and directories inside of a directory. An annotated tag is a reference to a specific commit. That information is all that Git needs to rebuild the full contents of a commit. ![]() A commit object is a simple text file that contains information such as the commit user information, commit message, a reference to the commits parent or parents and a reference to the root tree of the project. Internally, Git uses objects to store four types of things. We will start by briefly discussing Git objects. It will probably take you about 5-10 hours to go through one of the two paths, but your mileage may vary. This course tries to be as concise as possible. ![]() However, most of the knowledge that you gain in this course applies to Git itself, and you can apply this knowledge to other hosted Git providers (such as GitHub). Bitbucket is free for teams of up to 5 people, including private repositories. This course uses Bitbucket () as the hosted provider for remote Git repositories. If you use the command line path through the course, you can also use Linux. You can watch the videos and take the quizzes from your phone if you want, but the hands-on labs require you to have a Windows or Mac computer. Besides, repetition is good for learning :) Eventually, you might want to go through both paths, so that you can decide which tool to use for specific tasks. If you are not experienced with a command line, we highly suggest that you go through the Sourcetree path. One path assumes that you have experience using a command line interface, and the other path uses the Sourcetree graphical client. This is especially true if you currently "know just enough Git to be dangerous". This course assumes no previous knowledge of Git, but if you do have experience with it, you may find this course to be both useful and challenging. In this course, you will not learn everything there is to know about Git, but you will build a strong conceptual understanding of the technology, and afterward will be able to confidently dig deeper on any topic that interests you. You could also use Git to manage the many continuously improving revisions of that book that you are writing. It is a core component of DevOps, continuous delivery pipelines and cloud-native computing. It is used by most major technology companies, and is assumed knowledge for many modern programming and IT jobs. ![]() This allows the team to continuously improve its product. Git manages team files for large and small projects. Git is open source software originally created by Linus Torvalds. The Version Control with Git course provides you with a solid, hands-on foundation for understanding the Git version control system. ![]()
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