1.进入 hexo 博客主目录：

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cd /data/hexo/blog

2.安装搜索插件：

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root@ubuntuhome:/data/hexo/blog# npm install hexo-generator-searchdb --save

added 1 package, and audited 448 packages in 3s

28 packages are looking for funding
  run `npm fund` for details

11 vulnerabilities (2 low, 2 moderate, 7 high)

Some issues need review, and may require choosing
a different dependency.

Run `npm audit` for details.

3.编辑主题配置文件： themes/butterfly/_config.yml ,搜索关键字 local_search, 将下面的 enable: false 修改成 enable: true .

4.重启下 hexo:

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pm2 stop hexo_run.js && pm2 start hexo_run.js

5.再次刷新网页，在主页面就可以看到 Search 菜单了.