node.js - 无法更新/安装最新的 npm 版本

Question

如果我使用命令

apt npm install -g npm

或者

npm install -g npm@6.14.10

我仍然得到 npm@5.6.0 .这真的很奇怪。我还删除了所有内容并重新安装了它，但它没有用。
出现以下错误:

npm install -g npm

npm WARN npm npm does not support Node.js v14.15.3
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8, 9.
npm WARN npm You can find the latest version at https://nodejs.org/
npm ERR! cb.apply is not a function

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/tom/.npm/_logs/2021-01-03T11_35_05_408Z-debug.log

npm version

npm WARN npm npm does not support Node.js v14.15.3
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8, 9.
npm WARN npm You can find the latest version at https://nodejs.org/
{
    npm: '5.6.0',
    ares: '1.16.1',
    brotli: '1.0.9',
    cldr: '37.0',
    icu: '67.1',
    llhttp: '2.1.3',
    modules: '83',
    napi: '7',
    nghttp2: '1.41.0',
    node: '14.15.3',
    openssl: '1.1.1g',
    tz: '2020a',
    unicode: '13.0',
    uv: '1.40.0',
    v8: '8.4.371.19-node.17',
    zlib: '1.2.11'
}

不知道我需要改变什么来解决我的问题。我非常感谢每一个帮助。
更新: (感谢@Mr.)
使用命令: npm upgrade -g npm --verbose

npm info it worked if it ends with ok
npm WARN npm npm does not support Node.js v14.15.3
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8, 9.
npm WARN npm You can find the latest version at https://nodejs.org/
npm verb cli [
npm verb cli   '/usr/bin/node',
npm verb cli   '/usr/local/bin/npm',
npm verb cli   'upgrade',
npm verb cli   '-g',
npm verb cli   'npm',
npm verb cli   '--verbose'
npm verb cli ]
npm info using npm@5.6.0
npm info using node@v14.15.3
npm verb npm-session 78951400057ee470
npm verb update computing outdated modules to update
npm verb stack TypeError: cb.apply is not a function
npm verb stack     at /usr/local/lib/node_modules/npm/node_modules/graceful-fs/polyfills.js:287:18
npm verb stack     at FSReqCallback.oncomplete (fs.js:184:5)
npm verb cwd /home/tom
npm verb Linux 5.4.0-58-generic
npm verb argv "/usr/bin/node" "/usr/local/bin/npm" "upgrade" "-g" "npm" "--verbose"
npm verb node v14.15.3
npm verb npm  v5.6.0
npm ERR! cb.apply is not a function
npm verb exit [ 1, true ]

Answer 1

我有一个类似的问题。所以this帮助过我。也许它也可以解决您的问题。
(信用转到@Trott)