Git Extension中Push、Pull、Fetch操作被拒，Git Bash可正常执行求助

Hey there, it sounds like you're hitting that tricky scenario where Git's command line works perfectly but the Git Extensions GUI throws errors—this almost always boils down to environment or configuration mismatches between the two tools. Let's walk through the most common fixes:

1. Confirm Git Extensions uses the same SSH client as Git Bash #

Git Bash typically uses the OpenSSH bundled with Git, while Git Extensions might default to Windows' built-in OpenSSH. These two environments don't share key configurations automatically:

• In Git Bash, run ssh -v git@github.com and note two things: the OpenSSH_ version number, and the path where it loads your private key (look for lines like Load key "/c/Users/YourName/.ssh/id_rsa":).
• Open Git Extensions, go to Settings → Git → SSH, and check the "SSH client path":
  • If it points to C:\Windows\System32\OpenSSH\ssh.exe, it's using Windows' built-in tool
  • If it points to C:\Program Files\Git\usr\bin\ssh.exe, it matches Git Bash's setup
• If they don't match, update Git Extensions to use the same SSH client path as Git Bash, then restart the app and test again.

2. Ensure Git Extensions is targeting your correct SSH key #

Even if your public key is on GitHub, Git Extensions might not be picking up the corresponding private key:

• In Git Extensions' SSH settings, check if the "Private key file" field is filled. If it's empty, it tries to use ~/.ssh/id_rsa by default, but Windows path parsing can sometimes fail here—manually enter your private key path (e.g., C:\Users\YourName\.ssh\id_rsa).
• Verify your private key file permissions: SSH rejects keys that are readable by other users. Right-click the key file → Properties → Security, and make sure only your user account has read access (remove all permissions for other users/groups).

3. Clear cached credentials that might conflict #

Git Extensions sometimes caches old HTTPS credentials that clash with SSH authentication:

• In Git Extensions, go to Settings → Credentials and delete any saved entries for GitHub.
• Also, open Windows' Credential Manager, search for github.com, and delete all related Windows credentials. Restart Git Extensions after doing this.

4. Test SSH connection directly within Git Extensions #

To get precise error details, run an SSH test right in Git Extensions:

• Go to Repository → Open Git Bash (or use the built-in terminal in Git Extensions) and run ssh -v git@github.com.
• Look for specific errors like Permission denied (publickey) or "could not open key file"—these will point you straight to the root issue.

5. Match Git configurations between tools #

Sometimes Git Extensions uses a different config set than Git Bash:

• In Git Bash, run git config --list --show-origin and save the output.
• In Git Extensions, go to Repository → Git Command and run the same git config --list --show-origin command.
• Compare the two outputs, focusing on settings like core.sshCommand, user.name, and user.email. Adjust Git Extensions' config to match Git Bash if there are discrepancies.

If none of these steps fix the problem, share the exact error message Git Extensions shows when you try to push/pull/fetch—this will help narrow things down further!

内容的提问来源于stack exchange，提问作者Hoang