linux下载安装mysal

一.MySQL的版本选择潜规则:
https://www.mysql.com/

MySQL5.6:
1.选择GA 6-12个月
2.小版本号为偶数版

MySQL5.7
1.选择GA 6-12个月
2.小版本号为偶数版
3.MySQL5.7.17以上版本 MGR

二.MySQL源码安装
1.解压
[root@db01 ~]# tar xf mysql-5.6.40.tar.gz
2.进入目录
[root@db01 ~]# cd mysql-5.6.40
[root@db01 mysql-5.6.40]# ll
3.生成编译文件

cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql-5.6.40
-DMYSQL_DATADIR=/usr/local/mysql-5.6.40/data
-DMYSQL_UNIX_ADDR=/usr/local/mysql-5.6.40/tmp/mysql.sock
-DDEFAULT_CHARSET=utf8
-DDEFAULT_COLLATION=utf8_general_ci
-DWITH_EXTRA_CHARSETS=all
-DWITH_INNOBASE_STORAGE_ENGINE=1
-DWITH_FEDERATED_STORAGE_ENGINE=1
-DWITH_BLACKHOLE_STORAGE_ENGINE=1
-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1
-DWITH_ZLIB=bundled
-DWITH_SSL=bundled
-DENABLED_LOCAL_INFILE=1
-DWITH_EMBEDDED_SERVER=1
-DENABLE_DOWNLOADS=1
-DWITH_DEBUG=0

4.编译
make

5.安装
make install

=========================二进制安装===============================

6.进入mysql程序目录
[root@db02 ~]# cd /usr/local/mysql-5.6.40/

7.创建mysql系统用户
[root@db01 mysql-5.6.40]# useradd mysql -s /sbin/nologin -M

8.进入配置文件及脚本目录
[root@db02 mysql-5.6.40]# cd support-files/

9.拷贝配置文件到etc
[root@db01 support-files]# cp my-default.cnf /etc/my.cnf
cp: overwrite ‘/etc/my.cnf’? y

10.拷贝启动脚本
[root@db01 support-files]# cp mysql.server /etc/init.d/mysqld

11.进入初始化目录
[root@db01 mysql-5.6.40]# cd /usr/local/mysql-5.6.40/scripts/

12.初始化数据库
[root@db01 scripts]# ./mysql_install_db --user=mysql --basedir=/usr/local/mysql-5.6.40 --datadir=/usr/local/mysql-5.6.40/data

13.做软连接
[root@db02 scripts]# ln -s /usr/local/mysql-5.6.40 /usr/local/mysql

14.启动mysql
[root@db02 scripts]# /etc/init.d/mysqld start

Starting MySQL.Logging to '/usr/local/mysql/data/db02.err'.
. SUCCESS!

15.添加环境变量
[root@db02 scripts]# vim /etc/profile
export PATH="/usr/local/mysql/bin:$PATH"

16.加载环境变量
[root@db02 scripts]# source /etc/profile

17.授权
[root@db01 scripts]# chown -R mysql.mysql /usr/local/mysql*

18.连接mysql
[root@db02 scripts]# mysql

19.设置mysql密码
[root@db02 scripts]# mysqladmin -uroot -p password 123

20.连接mysql
[root@db01 scripts]# mysql -uroot -p123

四.mysql基础优化:
1.删除 没有用的库
mysql> show databases;
mysql> drop database test;
Query OK, 0 rows affected (0.00 sec)

2.删除没有用的用户
mysql> select user,host from mysql.user;
mysql> drop user root@'::1';
Query OK, 0 rows affected (0.00 sec)
mysql> delete from mysql.user where user='root' and host='db01';