rpm -qa | grep mysql

rpm -e 已经存在的MySQL全名

 [root@localhost local]# mkdir mysql
 [root@localhost local]# groupadd mysql
 [root@localhost local]# useradd -r -g mysql -s /bin/false mysql
 [root@localhost local]# [root@localhost local]# chown -R mysql:mysql mysql
 # chown -R "权限"或"名"："组" 文件夹名称

tar -xvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz -C /usr/local
 mv mysql-5.7.23-linux-glibc2.12-x86_64/* /usr/local/mysql

[root@localhost mysql]# cp support-files/mysql.server /etc/init.d/mysql

vi /etc/init.d/mysql

touch my.cnf

# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[client]
port = 3306
default-character-set=utf8

[mysqld]
# 一般配置选项
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
character-set-server=utf8
default_storage_engine = InnoDB


sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

[root@localhost bin]# ./mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

service mysql start

[root@localhost bin]# ./mysql -uroot -p
Enter password: 输入默认的临时密码

mysql> set password=password('新密码');

[root@localhost bin]# vi /etc/profile

[root@localhost bin]# source /etc/profile

[root@localhost local]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
[root@localhost local]# firewall-cmd --reload

mysql> grant all privileges on *.* to root@'%' identified by '你的密码';
mysql> flush privileges;

[root@localhost local]# chkconfig --list

[root@localhost local]# chkconfig --add mysql
[root@localhost local]# chkconfig mysql on