Linux下mysql安装配置总计： 
MySQL安装配置

本例以root权限安装mysql数据库，mysql-5.1.37-linux-x86_64-glibc23.tar.gz安装包在/root/Nagios/ 目录下(根据实际情况)。

ü     在mysql-5.1.37-linux-x86_64-glibc23.tar.gz安装包所在目录，解压软件包

cd /root/Nagios/

tar -zvxf mysql-5.1.37-linux-x86_64-glibc23.tar.gz

ü     将解压的mysql文件夹，移到/usr/local/目录下

mv mysql-5.1.37-linux-x86_64-glibc23 /usr/local/mysql

ü     将mysql配置文件拷贝到/etc/目录下，并改名my.cnf

cp /usr/local/mysql/support-files/my-medium.cnf /etc/my.cnf

ü 添加mysql用户及用户组，用来运行mysql数据库

groupadd mysql

useradd -g mysql mysql

ü 修改mysql目录权限

// 设定root能访问/usr/local/mysql

chown -R root /usr/local/mysql                                                                                  

// 设定mysql组能访问/usr/local/mysql

chgrp -R mysql /usr/local/mysql                                                                                 

// 设定mysql用户能够访问/var/lib/mysql

chown -R mysql /usr/local/mysql/data

ü 在mysql解压目录下，生成mysql系统数据库，本例安装在/usr/local/mysql目录下

cd /usr/local/mysql                                                                                                   

./scripts/mysql_install_db --user=mysql&                                                                    

ü 以mysql用户启动mysql服务

/usr/local/mysql/bin/mysqld_safe -user=mysql&

ü 修改mysql的root密码，密码假定为：123456

/usr/local/mysql/bin/mysqladmin -u root password 123456

ü 进入MYSQL安装路径下的bin目录，以root用户登录mysql:

cd /usr/local/mysql/bin                                                                                       

./mysql -u root -p                                                                                                    

输入密码：123456

ü 开启 mysql 本地和远程访问

grant all on *.* to root@本机ＩＰ

grant all privileges on *.* to root @"%" identified by "123456";

flush privileges;

说明：

grant all privileges on *.* to username @"%" identified by "password";

all指定相关操作

*.*说明数据库和表名

username表示用户名

%这里是Host名称，允许所有的就用%

Password表示密码

  设置MySQL服务及命令

拷贝mysql安装目录下bin/目录中的文件到/usr/bin目录，使mysq等命令可以在任一路径执行:

cp /usr/local/mysql/bin /usr/bin

设置mysql启动命令，打开/usr/local/mysql/support-files/mysql.server文件，将以下内容：

$bindir/safe_mysqld --datadir=$datadir --pid-file=$pid_file &

改为：

$bindir/safe_mysqld --datadir=$datadir --user=root --pid-file=$pid_file &

       拷贝到/etc/init.d目录，并赋可执行权限

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

chmod +x /etc/init.d/mysql

       以root用户调用以下命令启动mysql服务

service mysql start

       设置mysql自启动

在文件/etc/rc.d/rc.local中添加

service mysql start