一、brew安装卸载nvm
安装：curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
再运行：
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
卸载：cd ~
ls -a
rm -rf .nvm
移除掉 ~/.bash_profile文件中关于nvm的配置
二、nvm管理node
nvm ls
nvm ls-remote
nvm install 12
nvm uninstall 12
nvm use 12
nvm which 12
