服务器系统版本:Ubuntu Server 18.04.1 LTS 64bit解决方案:sudo passwd然后自己输入一个密码su root就可以解决问题了。来源:https://blog.csdn.net/weixin_41601114/article/details/112182356?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-5-112182356-blog-52734746.pc_relevant_aa2&spm=1001.2101.3001.4242.4&utm_relevant_index=8