Git is a distributed code management tool that facilitates code management when multiple people collaborate. There are two main ways to use Git to manage code in win7 system.

Method 1: msysgit

Step 1: Download and install msysgit

msysgit is the Windows version of Git. Download and install according to the default options. After the installation is complete, find “Git” -> “Git Bash” in the start menu. Clicking it will pop up a command line window, indicating that Git is installed successfully.

Step 2: Set username

Enter the following command at the command line

	$ git config --global user.name "Your Name"
	$ git config --global user.email "email@example.com"

Note: Using this parameter in the --global parameter of the git configg command means that all Git repositories on your computer will use this configuration. Of course, you can also specify different user names and email addresses for a certain repository.

Step 3: Create a repository

Choose a suitable place and create an empty directory:

	$ mkdir  gitskills  // Create a directory named gitskills
	$ cd   gitskills    // Switch gitskills directory
	$ pwd           // pwd command is used to display the current directory
    $ git init      // Initialize the Git repository, and there will be an additional .git directory in the current directory (hidden by default)

Note: To avoid inexplicable errors, please ensure that the directory name (including the parent directory) does not contain Chinese.

Step 4: Add files to the repository

Create a new file in the directory you just created (such as gitskills), or copy files from other places to this directory.

	$ git add readme.md  // Add a readme.md file
$ git commit -m "Additional information when submitting" // Submit the file to the warehouse and attach relevant description text (enclosed in quotation marks)

Note: Every time you modify a file, you need to git add to the staging area first, and then git commit to the warehouse. You can add one file and then commit, or you can add multiple files and then commit together.

Commonly used Git commands:

  1. Check status: git status

  2. Push to the remote library: git remote add origin git@github.com: the name of the specific remote library

  3. View difference: git diff readme.md

  4. View the history: git log or git log --pretty=oneline.

You will see a large string of hexadecimal strings similar to commit: 8a56b4...ba53c1e50, which is the version number commit id, which will be used when rolling back.

  1. Version rollback: To only roll back to the previous version, you can use the command git reset --hard HEAD^; if there are many versions, you can first use git log to find the corresponding version number commit_id, and then use the command git reset --hard commit_id (you don’t need to write the complete version number, git will automatically find the matching one)

  2. Check the command history: git reflog. If you regret it after rolling back and have closed Git, then use git reflog to find the corresponding commit so that you can go back to a future version.

  3. Update the local library: Use git pull to update the local library before pushing, so as to avoid the remote library having changed and causing the push to fail and report an error.

  4. Common errors and solutions:

Common error 1:

	fatal: remote origin already exists.

Solution: Delete the remote git repository first, then add it

	git remote rm origin

git remote add origin git@github.com: the remote git repository of the project

Method 2: Use GitHub for Windows provided by GiHub

The easiest way to use Git on the window platform is to use GitHub for Windows provided by the GitHub website. The advantage is the direct graphical operation interface, no need to remember the commands at all.