Skip to main content

GIT Study Note: Six Git Commands You Should Know!


What is Git?

According to Git website, Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Basically, we can use Git to track all of changes and revert them back if we made mistakes.

The version control system is a way for us to work with different versions of our code, so that we can save different features and make notes as we progress. It is also very useful for team collaboration.



Six Git Command You Should Know

1. Git Init

In our server, we need to create a "Git" directory and inside of "Git", we make another direcory "git_inro". Then, we add a file "app,js" in the "git_intro" folder.

The first thing we need to run is "git init". When we run git init, it will make a directory which is hidden called ".git". Wherever I run that git init command, it's going to track all of our changes.


2. Git Status

Git status asks for a status which is a common process to run before we do anything else. It shows untracked file "app.js". The reason that it is untracked because by just initializing a repository in a folder, it doesn't automatically track every file and every change. 

If we don't want Git to track some files, we can tell git to ignore.



3. Git Add

Git add allows us to add the files and tell the git those are the files we want to track.


4. Git Commit

Git add and git commit are the two step workflows to make the track process work.

Then, we commit which is is basically making a check point in time with changes that you have added. 


The "-m" is short for "-message". It allows us to type in a commit message to describe what the what the things we are saving.

Then, we git add app.js to track the file, and check the status. It shows that changes to be committed. This means that the new file is what is going to be saved.


5. Git Log

If we want to go back to the old version. The first thing we want to do is run "git log". It will give us a history of all the commits that we have made.


Once we enter, we can see the author name, email, date, and commit message. The most important thing is the long commit string which on the top of author. This commit string is the unique identifier. We will use this number to checkout the file.

6. Git Checkout

We copy the long number and paste after "git checkout", what we will receive is a message about warning us that we should probably add and commit or get rid of it entirely. The "detached Head" is basically a pointer in space or in time. 


Usually we use check out to just go look some old changes, to check out old code and then go back to where we were.

Labels:

Comments

Post a Comment

Popular posts from this blog

Intermediate Express.js: How To Add Styles & Partials in EJS File?

So far, we only have simple HTML tags and ejs tags in each ejs file. Every template page has no style at all. And the basic HTML header and footer are also missing. Today, I learned how to add styles and partials in ejs file. Link Style Step One: Touch a Separate CSS file I create a new directory "Style" under the "EJSDemo" directory, then I add a new CSS file "app.css" inside "Style" folder. Step Two: Add app.use(express.static()) in the app.js I add app.use(express.static("style")) in the "app.js". This will tell Express.js to serve the content of "Style" directory. Step Three: Write styles in CSS file I simple give body an orange background color and set text color to be grey. Step Four: Link to CSS file in the EJS file I just add <link> tag to link the "app.css" file on the top of the h1 tag in each ejs template. As the result, when I run the app and...
Post a Comment
Read more

Intro to Backend: Is Browser The Only Place To Send HTTP Request?

Today,  I begin to learn the second part of web develop course: backend. Frontend is the stuff that we can see and interactive with, such as HTML, CSS, and JS. We can type our code, style our page, or write some function to make interaction. However, backend is everything else. For example, we type Target web address in the Internet Browser. As we hit "enter", there are a few steps to go through: 1. The HTTP request is sent to a particular server's IP address. 2. The server figures out what to send us 3. It sends a HTTP response back to us Those process we are hard to see, and it happens in less than one second. The instructor said that the browser is not the only place to send the HTTP request, and there are so many choices out there. In this learning course, we are going to use Postman App . Postman allows us to make HTTP requests and viewer responses. It is really for developers to understand how things are working or debug something. In the P...
Post a Comment
Read more

Intermediate CSS: Three Steps To Create A Photo Gallery

I have seen many image blogs these years. People love to post their photos online to express life and feeling.  Image is powerful because it could bring a visual story to audience. People can see what you see, and may be feel the same way as you feel, too. If we want to build our own photo gallery, what should we do? Luckily, the boot-camp instructor just showed me how to use HTML and CSS to create a simple photo gallery.  I would love to share my study note here. (p.s. all the image links are provided by Udemy course instructor) Step One: Add Image Links on HTMLPage The instructor provides all the image links. All we need to do is add those links inside the <img> tag. Without CSS, the page will looks like this: they are not organized, and sizes are different, too. Step Two: Set Image Property Values We set the width of each photo the same value which is 30%, so there will be three images per line. The percentage value can help...
Post a Comment
Read more