# 删除旧环境
rpm -qa | grep mysql
rpm -qa | grep mariadb
rpm -e --nodeps <包名>    # 强制删除包
rm -rf /etc/my.cnf
rm -rf /etc/mysql

# 安装依赖包
yum install libaio
yum install libtinfo.so.5

# 上传包到opt目录，解压
cd /opt
tar zxvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.19-linux-glibc2.12-x86_64 mysql

# 创建用户和目录
groupadd mysql
useradd -r -g mysql -s /bin/false mysql
mkdir -p /opt/mysql/data
mkdir -p /opt/mysql/logs
chown -R mysql:mysql /opt/mysql

# 修改配置文件
vi /etc/my.cnf
------------------------------------------
[mysqld]
port=3306
basedir=/opt/mysql
datadir=/opt/mysql/data
socket=/opt/mysql/data/mysql.sock
pid-file = /opt/mysql/data/mysql.pid
log-error = /opt/mysql/logs/error.log
character-set-server=utf8mb4

[mysql]
default-character-set=utf8mb4

[client]
socket=/opt/mysql/data/mysql.sock
------------------------------------------

# 初始化数据库
bin/mysqld --initialize --user=mysql --basedir=/opt/mysql --datadir=/opt/mysql/data

# 修改启动脚本
vi support-files/mysql.server
------------------------------------------
basedir=/opt/mysql
datadir=/opt/mysql/data
------------------------------------------