Under ubuntu, node has already been installed. Why is there no result in executing node commands such as node command or node -version?

  node.js, question

The following input node did not respond
如下输入node并没有反应

Reinstallation also indicates that my node is already installed.

重新安装也提示我的node已经安装了

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I have solved the problem. It was good to lose an nvm use 0.12.

nvm use stable