查看node位置：

whereis node
node: /usr/local/bin/node /usr/local/share/man/man1/node.1

# /usr/local/bin/node是软连接，node放在/usr/local/Cellar/node/21.7.1/bin/node

查看node和npm版本

node -v                                
v21.7.1

npm -v 
10.5.0

查看npm文件存放路径

npm config get cache
/Users/charles/.npm

npm config get prefix
/usr/local