What should I do if 'npm command not found'?
Node.js is not installed or not on your PATH. Install Node.js from the official site or use a version manager like nvm, then reopen your terminal so the PATH updates.
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More FAQs in Common npm Install Errors in React Projects and How to Fix Them
Read the conflict to see which packages expect different versions, then update the offending package. Avoid using the legacy resolver flag as a first solution; it masks the real version mismatch.
Avoid using sudo. Use a version manager like nvm so global installs do not need elevated permissions, and fix folder ownership for node_modules if it is wrong. sudo masks the real problem and can cause more issues.
They mean a package expects another related package at a specific version. They are warnings, not always errors. Only act on them if something actually breaks; do not panic at every warning.
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