安装nvm%curl-o-https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.4/install.sh|bash安装完成验证%nvm--version0.40.0安装NodeJs%nvminstall14.21.3%nvminstall20查看安装的NodeJs%nvmls->v14.21.3v20.18.0切换NodeJs版本