今日npm update -g、nodejsアプリディレクトリで使用することにしたときに問題に遭遇しました。これは悪い決定でした。npmでよくある悲惨な問題に遭遇したからです。
解決策は、nodejsとnpmを再インストールすることです。残念ながら、sudo apt-get install npmそれを使用してnpmをインストールしようとするとうまくいきません。
端末の完全なエラーは次のとおりです。
Some packages could not be installed. This may mean that you have requested
an impossible situation or if you are using the unstable distribution that 
some required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
 npm : Depends: nodejs but it is not going to be installed
   Depends: node-abbrev (>= 1.0.4) but it is not going to be installed
   Depends: node-ansi but it is not going to be installed
   Depends: node-archy but it is not going to be installed
   Depends: node-block-stream but it is not going to be installed
   Depends: node-fstream (>= 0.1.22) but it is not going to be installed
   Depends: node-fstream-ignore but it is not going to be installed
   Depends: node-github-url-from-git but it is not going to be installed
   Depends: node-glob (>= 3.1.21) but it is not going to be installed
   Depends: node-graceful-fs (>= 2.0.0) but it is not going to be installed
   Depends: node-inherits but it is not going to be installed
   Depends: node-ini (>= 1.1.0) but it is not going to be installed
   Depends: node-lockfile but it is not going to be installed
   Depends: node-lru-cache (>= 2.3.0) but it is not going to be installed
   Depends: node-minimatch (>= 0.2.11) but it is not going to be installed
   Depends: node-mkdirp (>= 0.3.3) but it is not going to be installed
   Depends: node-gyp (>= 0.10.9) but it is not going to be installed
   Depends: node-nopt (>= 2.1.1) but it is not going to be installed
   Depends: node-npmlog but it is not going to be installed
   Depends: node-once but it is not going to be installed
   Depends: node-osenv but it is not going to be installed
   Depends: node-read but it is not going to be installed
   Depends: node-read-package-json (>= 1.1.0) but it is not going to be installed
   Depends: node-request (>= 2.25.0) but it is not going to be installed
   Depends: node-retry but it is not going to be installed
   Depends: node-rimraf (>= 2.2.2) but it is not going to be installed
   Depends: node-semver (>= 2.1.0) but it is not going to be installed
   Depends: node-sha but it is not going to be installed
   Depends: node-slide but it is not going to be installed
   Depends: node-tar (>= 0.1.18) but it is not going to be installed
   Depends: node-which but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
npmを正しくインストールして再度実行するにはどうすればよいですか?
ありがとう。