tar xf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

mv mysql-5.7.24-linux-glibc2.12-x86_64 /usr/local/mysql5.7 

 groupadd mysql

opt]# useradd -r -g mysql mysql

chown -R mysql:mysql mysql5.7

 Cd /home/usr/local/mysql5.6/
mkdir data
mkdir log
chown -R mysql:mysql mysql5.7

./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql5.7/ --datadir=/usr/local/mysql5.7/data/

 cp mysql.server /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld

 vi /etc/init.d/mysqld
basedir= /usr/local/mysql5.7
datadir= /usr/local/mysql5.7/data

 vi /etc/profile
export MYSQL_HOME=" /usr/local/mysql5.7"
export PATH="$PATH:$MYSQL_HOME/bin"

source /etc/profile

vi /etc/my.cnf
[client]
port=3306
[mysqld]
basedir=/usr/local/mysql5.7
datadir=/usr/local/mysql5.7/data
#socket=/usr/local/mysql5.7/mysql.sock
socket=/tmp/mysql.sock
user=mysql
#skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd
[mysqld_safe]
log-error=/usr/local/mysql5.7/log/mysqld.log
pid-file=/usr/local/mysql5.7/data/mysqld.pid
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

 chkconfig --add mysqld
 chkconfig mysqld on

 service mysqld start
 netstat -anpt

2018-11-02T02:07:44.574468Z 1 [Note] A temporary password is generated for root@localhost: lXyB0%fi#9-S （這個就是密碼）
mysql> help contents
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> help contents
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql> alter user 'root'@'localhost' identified by 'youpassword';

mysql> set password=password("youpassword");

mysql> flush privileges;
mysql> help contents