Mysql5.7安装(Linux)

环境：CentOS7，Mysql5.7
ps：这是本人搭生产环境的时候梳理的 真实有效！

1. 卸载系统自带mysql

yum list installed | grep mariadb
yum -y remove mariadb-libs.x86_64

2. 解压

tar -zxvf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz -C /data/soft/

3. 重命名

mv mysql-5.7.28-linux-glibc2.12-x86_64 mysql-5.7.28

4. 创建数据目录

cd mysql-5.7.28
mkdir data

5. 授权

groupadd mysql
useradd -g mysql mysql
chown -R mysql:mysql /data/soft/mysql-5.7.28

6. 创建配置文件

vi /etc/my.cnf

[mysqld]
port=3306
user=mysql
basedir=/data/soft/mysql-5.7.28
datadir=/data/soft/mysql-5.7.28/data
socket=/tmp/mysql.sock
log-error=/data/soft/mysql-5.7.28/data/mysql.err
pid-file=/data/soft/mysql-5.7.28/data/mysql.pid
character_set_server = utf8
max_allowed_packet=500M
max_allowed_packet=500M
max_connections=1000
lower_case_table_names=1
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,ALLOW_INVALID_DATES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
plugin-load=validate_password.so
validate_password_policy=0
validate-password=FORCE_PLUS_PERMANENT
	
[client]
default-character-set=utf8
	
[mysql]
default-character-set=utf8

8. 初始化

./mysqld  --defaults-file=/etc/my.cnf --user=mysql --datadir=/data/soft/mysql-5.7.28/data --basedir=/data/soft/mysql-5.7.28 --initialize

9.查看初始密码

vi /data/soft/mysql-5.7.28/data/mysql.err

10.开机自启动

cp /data/soft/mysql-5.7.28/support-files/mysql.server /etc/init.d/mysql

11.启动服务

service mysql start

12.登录数据库，做初始设置

• 改密码

SET PASSWORD = PASSWORD('123456');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
FLUSH PRIVILEGES;

• 使root能在任何host访问

use mysql;
update user set host = '%' where user = 'root';
FLUSH PRIVILEGES;

至此，已完成Mysql的安装，并能通过任何客户端访问