Fix · Node, npm and build

command not found: npm, node, next or another tool

What you may see

The terminal says command not found
It works on another computer, or worked before I restarted

Most likely cause

The tool is not installed, is not in the list of places the terminal looks (the PATH), or it is a project tool that was never installed with npm install.

Check first (about two minutes)

Run node -v and npm -v: do both print a version?
If only a project tool fails (next, vite), run ls node_modules/.bin to see if it is there.

The fix prompt

What you type here never leaves your browser. The search runs on this page, and nothing is sent to a server or to an AI.

The exact error or what you see

What you did before it happened

Kept only in this browser, on this device. Keys and passwords are removed before anything is saved.

Prompt language

You are a patient senior engineer who knows Node.js, npm and build tools and explains them to people who are not developers. I am not a developer, so explain every step in plain words and tell me exactly which button, menu or command you mean. If you are not sure about something, say so; do not guess.

THE PROBLEM
command not found: npm, node, next or another tool

THE EXACT ERROR OR WHAT I SEE
[paste the exact error here]

WHAT I DID BEFORE IT HAPPENED
[write in a few words what you did before it happened]

MOST LIKELY CAUSE
The tool is not installed, is not in the list of places the terminal looks (the PATH), or it is a project tool that was never installed with npm install.

DO THESE STEPS, IN THIS ORDER
1. Run node -v, npm -v, which node, echo $PATH and show me the output.
2. If node or npm is missing, tell me how to install Node from the official source or a version manager, and wait for my yes. Do not install anything yourself.
3. If only a project tool is missing, run npm install in the project folder (where package.json is), then run the tool with npm run <script> or npx.
Stop and tell me if what you see does not match a step. Do not skip ahead.

CHECK THAT IT WORKED
- node -v and npm -v print versions and npm run dev starts.
Tell me exactly what I should see on the screen when it works.

DO NOT CHANGE
- Do not use sudo to install project packages.
- Anything I did not ask about: the design, the text, other pages, other settings or the data.
- Do not delete files, data or branches, do not reset or force-push, and do not rewrite history, unless you first show me exactly what would be lost and I say yes.
- Do not paste, print or ask me to paste a password or secret key into this chat. If one is needed, tell me which settings page of the right service to store it in.

WHEN YOU FINISH
Explain in simple words what you changed (file by file or setting by setting), why you changed it, and how I can undo it.

Paste it into Claude, ChatGPT, Gemini or Cursor, then follow what it says.

After you tried it, did it work?

Steps

Run node -v, npm -v, which node, echo $PATH and show me the output.
If node or npm is missing, tell me how to install Node from the official source or a version manager, and wait for my yes. Do not install anything yourself.
If only a project tool is missing, run npm install in the project folder (where package.json is), then run the tool with npm run <script> or npx.

Do not do this

Do not copy commands from a random website that change system settings.
Do not use sudo to install project packages.

Try another entry