NPM Command Not Found Fix Checklist: quick fix, steps, and deep guide

Q: NPM Command Not Found Fix Checklist

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

What is the problem?

一份给新手使用的 npm command not found 排查清单，覆盖终端类型、Node/npm 版本、PATH、安装方式、包管理器、客户权限和验证记录。

Quick solution

Treat this as a Node.js errors checklist 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

记录系统和终端
检查 `node -v`
检查 `npm -v`
检查命令路径
重新打开终端
查看项目锁文件

Commands or code

node -v
npm -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.