为什么 "n" 不在 Mac 上降级我的节点版本？

Question

我正在使用 Mac 大苏尔。我想降级 Node.js 的版本。我尝试了下面的方法（没有 sudo 的安装会给我权限错误）…

$ sudo n 14.15.1
   installed : v14.15.1 to /usr/local/bin/node
      active : v14.17.6 at /usr/local/opt/node@14/bin/node

但我检查时仍然得到当前版本

$ node -v
v14.17.6

顺便说一句，这是我看到的“哪个节点”

$ which node
/usr/local/opt/node@14/bin/node

编辑： 我的 $PATH 当我运行 'echo $PATH' ...

/usr/local/opt/node@14/bin:/Users/davea/.rvm/gems/ruby-2.7.1/bin:/Users/davea/.rvm/gems/ruby-2.7.1@global/bin:/Users/davea/.rvm/rubies/ruby-2.7.1/bin:/usr/local/opt/node@14/bin:/Users/davea/.nvm/versions/node/v14.18.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.rvm/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.rvm/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.rvm/bin

编辑 2： 普通用户和 sudo 用户的 PATH 变量 ...

$ env | grep PATH
PATH=/Users/davea/.rvm/gems/ruby-2.7.1/bin:/Users/davea/.rvm/gems/ruby-2.7.1@global/bin:/Users/davea/.rvm/rubies/ruby-2.7.1/bin:/Users/davea/.nvm/versions/node/v14.18.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.rvm/bin

$ sudo env | grep PATH
PATH=/Users/davea/.rvm/gems/ruby-2.7.1/bin:/Users/davea/.rvm/gems/ruby-2.7.1@global/bin:/Users/davea/.rvm/rubies/ruby-2.7.1/bin:/Users/davea/.nvm/versions/node/v14.18.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.cabal/bin:/Users/davea/.ghcup/bin:/Users/davea/.rvm/bin

Answer 1

n 消息告诉您它刚刚“安装”的版本和“活动”的版本不同。您安装了两个版本的节点，活动版本是 PATH.

中的第一个版本

活动版本是/usr/local/opt/node@14/bin/node。我不认识那条路径，不确定用来安装它的是什么。它必须在您的 PATH 变量中并且您的登录脚本中可能有关于将 /usr/local/opt/node@14/bin 添加到 PATH?

的线索

要让 n 安装的节点版本成为活动版本，您可以删除节点的另一个副本，或者将 /usr/local/bin 放在 PATH 前面以便找到它首先，或最简单的从您的 PATH 变量中删除 /usr/local/opt/node@14/bin。

Answer 2

如果您要使用多个节点版本，例如 nvm:

nvm install <version>

更改版本：

nvm use <version>

文档：

https://github.com/nvm-sh/nvm

为什么 "n" 不在 Mac 上降级我的节点版本？

Why doesn't "n" downgrade my node version on a Mac?

node.js

macos

n