npmをapt-getしようとしたときのエラー対処
npmを入れようとしたら Unable to correct problems, you have held broken packages. とか怒られたので対処方法を調べた。
% sudo apt-get install npm Reading package lists... Done Building dependency tree Reading state information... Done 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.
どうも先にppaリポジトリを追加してnodejsをインストールしていたために、 依存関係でエラーが出た様子。
sudo apt-get --purge remove nodejs sudo add-apt-repository --remove ppa:chris-lea/node.js sudo apt-get install npm
これで無事インストールできた。