centos 7.0下安装MySQL 5.7.26

1.下载MySQL 5.7.26安装包，卸载自带MySQL数据库

yum remove mariadb-libs -y

yum install -y libaio-devel

2.上传MySQL 5.7.26安装包，并解压，创建软连接

gunzip mysql‐5.7.26‐linux‐glibc2.12‐x86_64.tar.gz

tar -xvf mysql-5.7.26-linux-glibc2.12-x86_64.tar

ln -s /stage/mysql-5.7.26-linux-glibc2.12-x86_64 /usr/local/mysql

3.添加用户组，用户，创建目录，修改相关目录权限

groupadd mysql

useradd -g mysql mysql

chown -R mysql.mysql /usr/local/mysql*

mkdir -p /data/3306/datadir

mkdir -p /data/3306/binlog

chown -R mysql.mysql /data*

4.修改profile

vi /etc/profile

export PATH=/usr/local/mysql/bin:$PATH

source /etc/profile

5.初始化

mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/3306/data

或者

mysql --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/3306/data

6.修改配置文件

vi /etc/my.cnf

[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/data/3306/data
log_bin=/data/3306/binlog/mysql‐bin
port=3306
server_id=7
socket=/tmp/mysql.sock
[mysql]
socket=/tmp/mysql.sock

7.准备启动脚本

cd /usr/local/mysql/support‐files/

cp /usr/local/mysql/support‐files/mysql.server  /etc/init.d/mysqld

vi /etc/init.d/mysqld

basedir=/usr/local/mysql
datadir=/data/3306/data

/etc/init.d/mysqld start

8.修改密码

方法一：mysqladmin -uroot -p password

方法二：alter user root@localhost identified by 'mysql';

方法三：mysqladmin -uroot -p password mypassword

方法四：SET PASSWORD = PASSWORD("mysql");

方法五：SET PASSWORD FOR 'root'@'localhost' = PASSWORD("mysql");

方法六：update mysql.user set authentication_string=password('mysql') where user='root' and host='localhost';flush privileges;