Git Authentication Failed Fix: quick fix, steps, and deep guide

Q: Git Authentication Failed Fix

Treat this as a GitHub tutorial issue. Confirm the environment, inputs, permissions, logs, and delivery boundary, then use the linked deep guide for the full checklist.

What is the problem?

新手遇到 git authentication failed 时，先区分 HTTPS、SSH、令牌过期、账号权限和远端地址问题。本文给出安全排查顺序，避免索要客户密码或误改仓库权限。

Quick solution

Treat this as a GitHub tutorial issue. First confirm the environment, inputs, permissions, logs, and delivery boundary. Then use the linked deep guide for the full checklist before changing production code or promising a result.

Read the deep guide

Detailed steps

Confirm the scenario, tool version, account permissions, inputs, and expected output before changing anything.
Check configuration, logs, command output, and human review boundaries against the linked deep guide.
Record the before and after result, then verify that the fix did not introduce platform, privacy, or delivery risk.

Commands or code

git remote -v

Risk notes

Confirm the real project environment, account permissions, platform rules, and output quality before delivery. Do not ship AI-generated changes without human review, and do not claim indexing, income, deployment success, or ranking improvements without measured evidence.