MySQL安装及初始化

一、下载链接地址：

https://dev.mysql.com/downloads/mysql/            #下载完成后直接解压即可

二、windows下初始化MySQL

1、把MySQL的解压路径加入到系统环境变量中

2、把MySQL设置为windows服务

C:\Users\test>mysqld --install        #安装
C:\Users\test>mysqld --remove         #从windows服务中删除
C:\Users\test>net start/stop mysql    #启动或停止MySQ服务

3、用MySQL自带客户端登陆到MySQL，并查看当前登陆的用户，默认为ODBC

 1 C:\Users\Jun>mysql
 2 mysql> select user();
 3 +----------------+
 4 | user()         |
 5 +----------------+
 6 | [email protected] |
 7 +----------------+
 8 1 row in set (0.00 sec)
 9 [[email protected] mysql]# mysqladmin -uroot password 123456            #设置root密码
10 [[email protected] mysql]# mysqladmin -uroot -p123456 password 1234     #更改root密码
11 [[email protected] mysql]# mysqladmin -uroot -p1234 password ""         # 把root用户的密码设置为空密码

4、Linux下密码破解

 1 [[email protected] mysql]# vim my.cnf
 2 [mysql]
 3 user=root
 4 password=123456
 5 [mysqld]
 6 skip-grant-tables                #在my.cnf文件中加上这句(跳过mysql授权表)   7   8 [[email protected] mysql]# /etc/init.d/mysqld restart #重启MySQL服务   9 [[email protected] mysql]# mysql #登录MySQL 10 mysql> select user(); #查看登录用户是否为root 11 +--------+ 12 | user() | 13 +--------+ 14 | [email protected] | 15 +--------+ 16 1 row in set (0.00 sec)17 18 mysql> update mysql.user set password=password("123") where user="root" and host="localhost"; #修改密码为123 19 mysql> flush privileges;

注：windows下密码破解可以使用和Linux上相同的方法   windows下另外破解密码方法

          1 C:\Users\test>net stop mysql
          2 C:\Users\test>mysqld --skip-grant-tables
          3 C:\Users\test>mysql
          4 mysql> update mysql.user set authentication_string=password(‘‘) where user = ‘root‘;
          5 mysql> flush privileges;
          6 C:\Users\test>net start mysql

5、指定登录用户名和密码和查看MySQL字符集

 1 C:\Users\test>mysql -uroot -p123456
 2 mysql> select user();
 3 +----------------+
 4 | user()         |
 5 +----------------+
 6 | [email protected] |
 7 +----------------+
 8 1 row in set (0.00 sec)
 9 mysql> show variables like ‘%char%‘;       #查看数据库字符集
10 +--------------------------+-------------------------------------------+
11 | Variable_name | Value |
12 +--------------------------+-------------------------------------------+
13 | character_set_client | utf8 |
14 | character_set_connection | utf8 |
15 | character_set_database | latin1 |
16 | character_set_filesystem | binary |
17 | character_set_results | utf8 |
18 | character_set_server | latin1 |
19 | character_set_system | utf8 |
20 | character_sets_dir | /application/mysql-5.6.35/share/charsets/ |
21 +--------------------------+-------------------------------------------+
22 8 rows in set (0.02 sec)

6、mysql客户端免输入用名密码登录及修改默认字符集

在mysql配置文件中加上(windows上为my.ini，Linux上为my.cnf)

[mysql]
default-character-set=utf8
user=root
password=123456
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
skip-grant-tables                 

C:\Users\Jun>mysql                 #登录MySQL
mysql> select user();
+----------------+
| user() |
+----------------+
| [email protected] |
+----------------+
1 row in set (0.00 sec)