Home Database Mysql Tutorial MySQL:如何为用户设置密码_MySQL

MySQL:如何为用户设置密码_MySQL

Jun 01, 2016 pm 02:12 PM
how password set up


  当初次在机器上安装完Mysql时,你可以匿名进行访问数据库或者以不带口令的root身份进入数据库.另外如果你是一个管理员,你还要进行一些用户的建立及授权,这又涉及到设置密码的问题.下面我们就讨论一下如何设置密码:
  
  首先我们应该知道Mysql数据库中的口令存储必须用password()函数加密它.因为在user表中是以加密形式存储口令,而不是作为纯文本.如果你没有加密,直接在数据库中执行以下语句:
  
  use mysql
  
  insert into user (host,user,password) values('%','user_name','your password');
  
  flush privileges;
  
  相信结果不会让你满意.因为服务器比较的是加密的值,所以服务器连接一定失败.这里需要说明的是flush privileges;这条命令起到了重新加载授权表.你也可以在shell下直接用mysqladmin -u root reload或者mysqladmin -u root flush-privileges来实现重载授权表.
  
  在Mysql环境下,你可以使用以下语句进行设置密码:
  
  1.insert into user(host,user,password) values('%','user_name',password("your password");
  
  2.set password for user_name = password("your password")
  
  以上两种方法都必须进行重载授权表.
  
  3.当然你也可以在创建一个用户时直接设置密码,grant语句将为你自动加密口令.
  
  如 grant all on *.* to user_name@% identified by "your password";
  
  另外你也可以在shell环境下用mysqladmin程序来设置密码
  
  如 mysqladmin -u root password "your password"
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