https://www.bilibili.com/video/BV1rN411277B/?spm_id_from=333.788.recommend_more_video.6&vd_source=fb8dcae0aee3f1aab700c21099045395
https://blog.csdn.net/wxqian25/article/details/19406673
待解决方案：
重新下载ubuntu，然后按照
https://www.bilibili.com/video/BV1rN411277B/?spm_id_from=333.788.recommend_more_video.6&vd_source=fb8dcae0aee3f1aab700c21099045395
su认证失败：
https://blog.csdn.net/xiaoxiali/article/details/17096591#:~:text=%E9%97%AE%E9%A2%98%EF%BC%9Asu%E8%AE%A4%E8%AF%81%E5%A4%B1%E8%B4%A5,%E4%BD%BF%E7%94%A8su%E5%91%BD%E4%BB%A4%E7%99%BB%E5%BD%95%E5%88%B0root%E7%94%A8%E6%88%B7%E6%97%B6%EF%BC%8C%E8%80%81%E6%98%AF%E6%8A%A5%22su%EF%BC%9A%E8%AE%A4%E8%AF%81%E5%A4%B1%E8%B4%A5%22%E9%94%99%E8%AF%AF%E3%80%82%20%E6%8A%A5%E8%BF%99%E4%B8%AA%E9%94%99%E8%AF%AF%E7%9A%84%E5%8E%9F%E5%9B%A0%E6%98%AFroot%E7%94%A8%E6%88%B7%E9%BB%98%E8%AE%A4%E6%98%AF%E8%A2%AB%E9%94%81%E5%AE%9A%E4%BA%86%E7%9A%84%EF%BC%8C%E5%8F%AA%E8%A6%81%E4%BD%BF%E7%94%A8passwd%E5%91%BD%E4%BB%A4%E9%87%8D%E6%96%B0%E8%AE%BE%E7%BD%AE%E4%B8%8Broot%E5%AF%86%E7%A0%81%E5%8D%B3%E5%8F%AF%E3%80%82
还是拖不进去，放弃，改用
