CentOS 7上手动编译安装MySQL 5.7.28二进制版教程

centos 7.6
https://www.mysql.com/ - downloads - MySQL Community (GPL) Downloads MySQL - Community Server -Looking for previous GA versions? - 5.7.28 - LinuxGeneric - 64-bit - Compressed TAR Archive - mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz

yum list installed |grep mysql
yum list installed |grep mariadb
mariadb-libs.x86_64 二进制情况的话暂不处理？postfix-2.10.1-7.el7.x86_64 has missing requires of libmysqlclient.so.18()    rpm -e mariadb-libs.x86_64 --nodeps 
yum install -y libaio libaio-devel vim

mkdir -p /db/{data,run,logs}
wget -P /db/ https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
tar zxvf /db/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz -C /db/
ln -s /db/mysql-5.7.28-linux-glibc2.12-x86_64 /db/mysql

groupadd mysql  &&  useradd mysql -g mysql
#passwd mysql  -- Cycfc1123#  (云主机密码简单会被入侵，建议不设置密码，Linux系统中一个没有密码的用户是禁止登录的，/etc/shadow无值，虽然在添加用户时没有设置密码，也不会有任何安全隐患。)
chown -R mysql:mysql /db
chmod 755 -R /db

初始化
/db/mysql/bin/mysqld --verbose --help
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf 
在MySQL 5.7.6之前，使用mysql_install_db，从MySQL 5.7.6开始， 不建议使用mysql_install_db。要初始化数据目录
--initialize    生成随机密码 初始化数据目录
--initialize-insecure   生成空密码 初始化数据目录 Create the default database and exit. Create a super user with empty password.
--daemonize         Run mysqld as sysv daemon
--user=name     Run mysqld daemon as user.
--basedir=name  Path to installation directory. All paths are usually  resolved relative to this
--datadir=name  Path to the database root directory