Centos6.9 installation Mysql5.7.18 step record

mysql-community-common-5.7.18-1.el7.x86_64.rpm
mysql-community-libs-5.7.18-1.el7.x86_64.rpm (depends on common)
mysql-community-client-5.7.18-1.el7.x86_64.rpm (depends on libs)
mysql-community-server-5.7.18-1.el7.x86_64.rpm (depends on common, client)
mysql-community-devel-5.7.18-1.el7.x86_64.rpm (MySQL header files and library files)
yum install gcc gcc-c++ ncurses-devel perl 
yum install cmake -y
groupadd mysql
useradd -r -g mysql mysql
mkdir -p /usr/local/mysql
mkdir -p /data/mysqldb
tar -zxvf mysql-boost-5.7.18.tar.gz and then install vi /etc/my.cnf
datadir=/data/mysqldb/
socket=/data/mysqldb/mysql.sock
explicit_defaults_for_timestamp=true
mysqld --initialize 
ln –s /data/mysql/mysql.sock /var/lib/mysql/
chown mysql:mysql /var/lib/mysql -R
chmod -R 777 /data/mysqldb
service mysqld stop 
mysqld_safe --skip-grant-tables &
mysql -uroot -p
>use mysql;
> update user set authentication_string=PASSWORD("password") where user="root";
 update user set host='%' where user="root";
FLUSH PRIVILEGES; 
service mysqld restart
mysql -uroot -ppassword
SET PASSWORD = PASSWORD('password');