mysql安裝
（親自測試择同，這個比較好）
http://www.linuxidc.com/Linux/2016-09/134940.htm
注意：mysql -u root //直接回車進(jìn)入mysql控制臺
直接進(jìn)入后臺修改root密碼之后两入，我們要注意拷貝修改/etc/my.cnf.rpmnew配置文件為/etc/my.cnf：
[client]
default-character-set=utf8
port=3306
socket=/var/lib/mysql/mysql.sock
[mysql]
no-auto-rehash
default-character-set=utf8
[mysqld]
character-set-server=utf8
init_connect='SET NAMES utf8'
port=3306
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
