首先让我提一下,我已经看了很多建议的问题,但没有找到相关的答案。这就是我正在做的。
我连接到Amazon EC2实例。我可以用这个命令登录MySQL根目录:
mysql -u root -p
然后我用host %创建了一个新的用户帐单
CREATE USER 'bill'@'%' IDENTIFIED BY 'passpass';
授予用户bill的所有权限:
grant all privileges on *.* to 'bill'@'%' with grant option;
然后我退出root用户,尝试用bill登录:
mysql -u bill -p
输入正确的密码并得到以下错误:
错误1045(28000):用户“账单”@“localhost”(使用密码:YES)的访问被拒绝
百分号表示所有ip,所以localhost是多余的…本地主机不需要第二条记录。
实际上有,'localhost'在mysql中是特殊的,它意味着通过unix套接字(或windows上的命名管道)连接,而不是TCP/IP套接字。使用%作为主机不包括'localhost'
MySQL用户帐户有两个组成部分:用户名和主机名。用户名标识用户,主机名指定用户可以从哪些主机连接。用户名和主机名的组合:
< user_name >的@ < host_name >的
您可以为主机名指定特定的IP地址或地址范围,或者使用百分比字符(“%”)使该用户能够从任何主机登录。
注意,用户帐户是由用户名和主机名同时定义的。例如,“root”@“%”与“root”@“localhost”是不同的用户帐户。
I discovered yet another case that appears on the surface to be an edge case; I can export to the file system, via SELECT INTO .. OUTFILE as root, but not as regular user. While this may be a matter of permissions, I've looked at that, and see nothing especially obvious. All I can say is that executing the query as a regular user who has all permissions on the data base in question returns the access denied error that led me to this topic. When I found the transcript of a successful use of SELECT INTO … OUTFILE in an old project, I noticed that I was logged in as root. Sure enough, when I logged in as root, the query ran as expected.