Linux CentOS7 （Windows）系统安装 MySQL

rpm -qa | grep mysql

rpm -e mysql　　// 普通删除模式
rpm -e --nodeps mysql　　// 强力删除模式，如果使用上面命令删除时，提示有依赖的其它文件，则用该命令可以对其进行强力删除

[root@localhost software]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
[root@localhost software]# rpm -ivh [root@localhost software]# mysql-community-release-el7-5.noarch.rpm
[root@localhost software]# yum update
[root@localhost software]# yum install mysql-server

[root@localhost software]# chown mysql:mysql -R /var/lib/mysql

[root@localhost software]# mysqld --initialize

Please read "Security" section of the manual to find out how to run mysqld as root!

[root@localhost software]# vim /etc/my.cnf

user=mysql #或者user=root

[root@localhost software]# systemctl start mysqld

[root@localhost software]# systemctl status mysqld

   mysqld.service - MySQL Community Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2019-01-25 21:20:53 CST; 35s ago
  Process: 66362 ExecStartPost=/usr/bin/mysql-systemd-start post (code=exited, status=0/SUCCESS)
  Process: 66300 ExecStartPre=/usr/bin/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 66360 (mysqld_safe)
   CGroup: /system.slice/mysqld.service
           ├─66360 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
           └─66539 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mysqld.log --pid-file=/var/run/mysq...

1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: Support MySQL by buying support/licenses at http://shop.mysql.com
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: Note: new default config file not created.
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: Please make sure your config file is current
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: WARNING: Default config file /etc/my.cnf exists on the system
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: This file will be read by default by the MySQL server
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: If you do not want to use this, either remove it, or use the
1月 25 21:20:52 localhost.localdomain mysql-systemd-start[66300]: --defaults-file argument to mysqld_safe when starting the server
1月 25 21:20:52 localhost.localdomain mysqld_safe[66360]: 190125 21:20:52 mysqld_safe Logging to '/var/log/mysqld.log'.
1月 25 21:20:52 localhost.localdomain mysqld_safe[66360]: 190125 21:20:52 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
1月 25 21:20:53 localhost.localdomain systemd[1]: Started MySQL Community Server.

[root@localhost software]# mysqladmin --version
 mysqladmin  Ver 8.42 Distrib 5.6.43, for Linux on x86_64
[root@localhost software]# 

[root@localhost software]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.43 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.01 sec)

mysql> 

[root@localhost software]# mysqladmin -u root password "root";
Warning: Using a password on the command line interface can be insecure.

[root@localhost software]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.43 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8
 
[mysqld]
# 设置3306端口
port = 3306
# 设置mysql的安装目录
basedir=C:\\web\\mysql-8.0.11
# 设置 mysql数据库的数据的存放目录，MySQL 8+ 不需要以下配置，系统自己生成即可，否则有可能报错
# datadir=C:\\web\\sqldata
# 允许最大连接数
max_connections=20
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB

cd C:\web\mysql-8.0.11\bin
mysqld --initialize --console

mysqld install

net start mysql

cd C:\web\mysql-8.0.11\bin 
mysqld --initialize-insecure 

[root@localhost software]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.6.43 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

skip-grant-tables

service mysql restart

mysql -u root -p

mysql> use mysql;
mysql>  update user set authentication_string=password("123456") where user='root';
mysql> flush privileges;  # 刷新权限

service mysql stop

cd /usr/local/mysql/bin  
./mysqld_safe --skip-grant-tables & 

update user set authentication_string=password("123456"),plugin='mysql_native_password' where user='root';