Please make sure you have the correct access rights and the repository exists. Problem solved

Permission denied (publickey).
fatal: Could not read from remote repository.

There is a problem with the public key. You need to set the user and mailbox first and then regenerate the ssh public key.

1. First, I have to reset the name and email address of the identity in git and enter the folder that needs to be submitted (because git Bash is opened directly, in the case of no pathDown, not at all! Method! Change! The pit I encountered when I just used git...)

git config --global user.name "yourname"

git config --global user.email "[email protected]"

Note: yourname is the name you want to set, and [email protected] is the email address you want to set.

2. Delete the known_hosts in the .ssh folder [C:\Users(local user name).ssh] (you can delete it directly)

3. Open bash.exe in the bin directory (usually C:\Program Files\Git\bin) in the downloaded Git and enter the command

$ ssh-keygen -t rsa -C "[email protected]" (please fill in the email address you set)
If the execution is successful.Return:
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/your_user_directory/.ssh/id_rsa):
If there is a previous storage address, it will return /Users/your username/.ssh/id_rsa already exists.Overwrite (y/n)? Enter y directly and press Enter.
Enter passphrase(empty for no passphrase) will appear if the address has not been stored before; also press Enter directly,
In both cases, Enter same passphrase again will appear after pressing Enter, and then pressing Enter will display
Thekey's randomart image is:
±–[RSA 2048]----+
| .o== oo+.o.oo. |
|…+=++…O =… . |
|.o.+oo+.B o o o |
| o…o.o . o |
| o…S o |
| . . o… |
| . . o o |
|. . + |
|oE .o . |
±—[SHA256]-----+

4. Then find the system to automatically generate two files in the .ssh folder, id_rsa and id_rsa.pub, open id_rsa.pub with Notepad and copy all the contents.

5. Open https://github.com/, log in to your account, go to Settings and find

6. Then paste the content you copied into the key and click Add SSH Key

7. Still enter ssh -T [email protected] in bash.exe and a bunch of content will pop up. You just need to type yes and hit enter and you're done, thenHe will prompt you to succeed.