npm install -g npm

运行npm install -g npm命令是用来全局安装npm包管理器，其中-g参数表示全局安装。通过全局安装npm，可以在任何目录中使用npm命令。这个命令通常用于更新npm的版本。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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