navicat连接MYSQL提示Can’t get hostname for your address

在redhat 5.5上用rpm安装MySQL 5.6装好mysql之后

用mysqladmin修改密码(mysqladmin �Cu root password “mysql”)提示

mysqladmin: Can’t turn off logging; error: ‘Access denied; you need the SUPER privilege for this operation’

解决办法：

修改mysql登录设置

vi /etc/my.cnf   (我们发现etc下没有my.cnf文件)

通过查询知道，安装完MySQL 后，/etc/my.cnf 文件默认是不存在的，可以在/usr/share/doc/MySQL-servercommunity下找到my-huge.cnf 、my-innodb-heavy-4G.cnf 、my-large.cnf 、mymedium.cnf 、my-small.cnf 等文件，根据内存大小将其中合适你机器配置的文件拷贝到/etc/my.cnf（一般应用选mymedium.cnf即可）

编辑my.cnf文件

在[mysqld]段中加入 skip-grant-tables

保存之后重启mysql服务

/etc/rc.d/init.d/mysql restart

重启mysql服务之后修改mysql密码

[root@shiyue]# mysql

Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3 to server version: 3.23.56

Type ‘help;’ or ‘h’ for help. Type ‘c’ to clear the buffer.

mysql> use mysql ;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> UPDATE user SET Password = password ( ‘mysql’ ) WHERE User = ‘root’ ;
Query OK, 0 rows affected (0.00 sec)
Rows matched: 2 Changed: 0 Warnings: 0

mysql> flush privileges ;
Query OK, 0 rows affected (0.01 sec)

mysql> quit
Bye

退出mysql之后把刚修改的配置文件改回来(vi /etc/my.cnf)

重启mysql服务

mysql -u root -p登录mysql

登陆成功！

再通过navicat连接mysql数据库，提示Can’t get hostname for your address                          

解决方法还是修改my.cnf文件，在[mysqld] 下面添加一行：skip-name-resolve ，保存重启mysql(/etc/init.d/mysql restart)

赋权：

Mysql �Cu root �Cp mysql

Show databases

Use mysql

grant all on *.* to ‘root’@’192.168.1.254′ identified by ‘mysql’;

quit

好重新用navicat进行连接，OK，测试通过！