代码：
circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated mkdirp-promise@5.0.1: This package is broken and no longer maintained. 'mkdirp' itself supports promises now, please switch to that.
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated uuid@3.3.2: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated ethereumjs-tx@2.1.2: New package name format for new versions: @ethereumjs/tx. Please update.
npm WARN deprecated ethereumjs-common@1.5.2: New package name format for new versions: @ethereumjs/common. Please update.
npm WARN deprecated multicodec@0.5.7: stable api reached
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
[..................] / fetchMetadata: sill resolveWithNewModule at-least-node@1.0.0 checking installable status
正在安装中，还未安装完成，请问是怎么回事
用的是npm -g install truffle进行安装
目前安装速度极慢，之前用cnpm安装也会报错，没想到换回npm也是一样的
解决了必采纳
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解决了，完全卸载node及npm，彻底删除文件，参见：https://www.cnblogs.com/fighxp/p/7410235.html
重启后重新安装node
命令行输入npm -g install npm@latest更新npm到最新7开头的版本
