如果遇到: OSError: `pydot` failed to call GraphViz.Please install GraphViz (https://www.graphviz.org/) and ensure that its executables are in the $PATH. Ubuntu 下解决方法: sudo apt install graphviz 或者尝试安装: pip install pydot pip install pydot-ng pip install gr…
问题: CentOS7安装完毕,重新开机启动后显示: Initial setup of CentOS Linux 7 (core) 1) [x] Creat user 2) [!] License information (no user will be created) (license not accepted) Please make your choice from above ['q' to quit | 'c' to continue | 'r' to refresh]: 解决方法:…
利用安全模式成功登陆,然后修改密码,等于给MySql设置了密码.登陆进去后,想查询所有存在的数据库测试下.得到的结果确实: ERROR 1820 (HY000): You must SET PASSWORD before executing this statement 非常诡异啊,明明用密码登陆进去了,怎么还提示需要密码. 参考官方的一个文档,见http://dev.mysql.com/doc/refman/5.6/en/alter-user.html.如下操作后就ok了: mysql> sh…