wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
  102  sudo rpm -Uvh mysql80-community-release-el7-3.noarch.rpm
  103  sudo yum install mysql-community-server
  104  yum clean packages
  105  sudo yum install mysql-community-server
  106  mysql -u root -p
  107  rpm -qa | grep mariadb
  108  rpm -qa | grep mysql
  109  yum --enablerepo=mysql80-community install -y mysql-community-server --no                                                                                                                                                                             gpgcheck
  110  yum install -y mysql-community-server
  111  systemctl start mysqld
  112  mysql -u root -p
  113      cat /var/log/mysql.log
  114      mysqld --initialize --user=mysql
  115  mysqld --initialize --user=mysql
  116  cat /var/log/mysql.log
  117   systemctl enable mysqld
  118   systemctl daemon-reload
  119  mysql -u root -p
  120  mysql
  121  mysql -u root
  122  mysqld --initialize --user=mysql
  123  sudo grep 'temporary password' /var/log/mysqld.log