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Fixing NPM Command Not Found Error

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Understanding NPM: NPM is JavaScript package manager essential for Node.js development
Error occurs when system doesn't know about npm or it's not set up correctly
Common Causes: NPM not installed on system
Incorrect PATH variable settings
Multiple Node.js versions or outdated versions
Insufficient permissions for node_modules directory
Windows Solutions: Install Node.js and npm using official Windows Installer
Verify PATH variable settings in System Environment
Remove duplicate Node.js installations
Use nvm for managing multiple Node.js versions
Linux Solutions: Install npm using package manager (apt/dnf)
Add npm directory to PATH variable in .bashrc
Check and grant proper permissions to node_modules
Verify npm version using command line
Key Steps: Check npm installation with npm -v command
Install Node.js and npm following distribution guidelines
Verify PATH variable settings
Ensure proper permissions for node_modules directory