1.安装包准备(MySQL官网下载)
(1)查看MySQL是否安装，如果存在就先卸载
[root@hadoop101 桌面]# rpm -qa|grepMySQL
mysql-libs-5.1.73-7.el6.x86_64
[root@hadoop101 桌面]# rpm-e --nodeps mysql-libs-5.1.73-7.el6.x86_64
(2)查看mariadb是否安装，如果存在就先卸载
[root@hadoop1 mysql-libs]# rpm -qa|grepmariadb
mariadb-libs-5.5.60-1.el7_5.x86_64
[root@hadoop1 mysql-libs]# rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64
(3)上传mysql-libs.zip到hadoop102的/opt/software目录，并解压文件到当前目录
[root@hadoop1 mysql-libs]# cd /opt/software
[root@hadoop1 software]# ll
total75988
-rw-r--r--. 1 root root 77807942 Aug 13 12:17 mysql-libs.zip[root@hadoop1 software]#unzip mysql-libs.zipArchive: mysql-libs.zipcreating: mysql-libs/inflating: mysql-libs/MySQL-client-5.6.24-1.el6.x86_64.rpm
inflating: mysql-libs/mysql-connector-java-5.1.27.tar.gz
inflating: mysql-libs/MySQL-server-5.6.24-1.el6.x86_64.rpm
[root@hadoop1 software]# ll
total75992drwxr-xr-x. 2 root root 4096 Jun 26 2015 mysql-libs-rw-r--r--. 1 root root 77807942 Aug 13 12:17 mysql-libs.zip
(4)进入到mysql-libs文件夹下
[root@hadoop1 software]# cd mysql-libs/[root@hadoop1 mysql-libs]# ll
total76048
-rw-r--r--. 1 root root 18509960 Mar 26 2015 MySQL-client-5.6.24-1.el6.x86_64.rpm-rw-r--r--. 1 root root 3575135 Dec 1 2013 mysql-connector-java-5.1.27.tar.gz-rw-r--r--. 1 root root 55782196 Mar 26 2015 MySQL-server-5.6.24-1.el6.x86_64.rpm
2.安装MySQL服务器
(1)安装MySQL服务端
[root@hadoop101 mysql-libs]# rpm -ivh MySQL-server-5.6.24-1.el6.x86_64.rpm
(2)查看产生的随机密码
[root@hadoop101 mysql-libs]# cat /root/.mysql_secret
OEXaQuS8IWkG19Xs
(3)查看MySQL状态
[root@hadoop101 mysql-libs]# service mysql status
(4)启动MySQL
[root@hadoop101 mysql-libs]# service mysql start
3.安装MySQL客户端
(1)安装MySQL客户端
[root@hadoop101 mysql-libs]# rpm -ivh MySQL-client-5.6.24-1.el6.x86_64.rpm
(2)链接MySQL(密码替换成产生的随机密码)
[root@hadoop101 mysql-libs]# mysql -uroot -pOEXaQuS8IWkG19Xs
(3)修改密码('000000'替换成你设置的密码)
mysql>SET PASSWORD=PASSWORD('000000');
(4)退出MySQL
mysql>exit
4.MySQL中user表中主机配置
配置只要是root用户+密码，在任何主机上都能登录MySQL数据库。
(1)进入MySQL
[root@hadoop101 mysql-libs]# mysql -uroot -p000000
(2)显示数据库
mysql>show databases;
(3)使用MySQL数据库
mysql>use mysql;
(4)展示MySQL数据库中的所有表
mysql>show tables;
(5)展示user表的结构
mysql>desc user;
(6)查询user表
mysql>select User, Host, Password from user;
(7)修改user表，把Host表内容修改为%
mysql>update user set host='%' where host='localhost';
(8)删除root用户的其他host
mysql>delete from user where Host='hadoop101';
delete from user where Host='127.0.0.1';
delete from user where Host='::1';
(9)刷新
mysql>flush privileges;
(10)退出
mysql>quit;
linux下，MySQL默认的数据文档存储目录为/var/lib/mysql
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