1：檢視系統版本

[[email protected] ~]# cat /etc/redhat-release
CentOS release 6.9 (Final)

wget https://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.37-linux-glibc2.12-x86_64.tar.gz

#groupadd mysql
#useradd -g mysql mysql

#cd /usr/local
#tar zxvf /{MySQL5.6_path}/mysql-{version}.tar.gz
 
例如配置路徑為：
#cd /usr/local
#tar zxvf /root/mysql-5.6.37-linux-glibc2.12-x86_64.tar.gz
 

#mv mysql-5.6.37-linux-glibc2.12-x86_64  mysql

cd mysql
chown -R mysql .
chgrp -R mysql .

#scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

#cp support-files/mysql.server /etc/init.d/mysqld
 

[[email protected] mysql]# cp my.cnf /etc/my.cnf

[email protected] mysql] vi /etc/my.cnf

basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
server_id = 1

#ln -s /usr/local/mysql/bin/mysql /usr/bin

#service mysqld start

mysql> SELECT user,host,password FROM mysql.user;
+------+-----------------------+----------+
| user | host                  | password |
+------+-----------------------+----------+
| root | localhost             |          |
| root | localhost.localdomain |          |
| root | 127.0.0.1             |          |
| root | ::1                   |          |
|      | localhost             |          |
|      | localhost.localdomain |          |
+------+-----------------------+----------+
6 rows in set (0.29 sec)
 
mysql> UPDATE mysql.user set password = PASSWORD('gechong') WHERE user = 'root';
 
mysql> DROP USER ''@localhost;
 
mysql> FLUSH PRIVILEGES;