CentOS6.5默认安装的MySQL版本是5.1,如果要安装5.5需要添加两个源

rpm -Uvh http://mirror.steadfast.net/epel/6/i386/epel-release-6-8.noarch.rpm

rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

 

安装:

查看是否存在5.5:yum –enablerepo=remi,remi-test list mysql mysql-server

安装 yum –enablerepo=remi,remi-test install mysql mysql-server

启动:

/etc/init.d/mysqld start或service mysqld start

设置开机自启动:chkconfig –levels 345 mysqld on

 

设置密码:

在 Navicat for MySQL 下面直接执行  SET PASSWORD FOR ‘root’@’localhost’ = PASSWORD(‘newpass’);   就可以

方法1: 用SET PASSWORD命令

mysql -u root

mysql> SET PASSWORD FOR ‘root’@’localhost’ = PASSWORD(‘newpass’);

方法2:用mysqladmin

mysqladmin -u root password “newpass”

如果root已经设置过密码,采用如下方法

mysqladmin -u root password oldpass “newpass”

方法3: 用UPDATE直接编辑user表

mysql -u root

mysql> use mysql;

mysql> UPDATE user SET Password = PASSWORD(‘newpass’) WHERE user = ‘root’;

mysql> FLUSH PRIVILEGES;

在丢失root密码的时候,可以这样

mysqld_safe –skip-grant-tables&

mysql -u root mysql

mysql> UPDATE user SET password=PASSWORD(“new password”) WHERE user=’root’;

mysql> FLUSH PRIVILEGES;

设置MySQL允许远程连接:

在本机先使用root用户登录mysql: mysql -u root -p”youpassword” 进行授权操作:

mysql>GRANT ALL PRIVILEGES ON *.* TO ‘root’@’%’ IDENTIFIED BY ‘youpassword’ WITH GRANT OPTION;

重载授权表:

FLUSH PRIVILEGES;

查看CentOS磁盘使用情况:df -ah