wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

卸载清理环境：

[root@bogon sysconfig]# whereis mysql

mysql: /usr/bin/mysql /usr/lib/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz

[root@bogon sysconfig]# rpm -aq|grep mysql

mysql-server-5.1.73-8.el6_8.i686

mysql-5.1.73-8.el6_8.i686

mysql-libs-5.1.73-8.el6_8.i686

[root@bogon sysconfig]# find / -name mysql

/usr/lib/mysql

/usr/lib/perl5/DBD/mysql

/usr/lib/perl5/auto/DBD/mysql

/usr/bin/mysql

/usr/share/mysql

/var/lib/mysql

/var/lib/mysql/mysql

[root@bogon sysconfig]# find / -name my.cnf

/etc/my.cnf

[root@bogon sysconfig]# service mysqld status

mysqld is stopped

[root@bogon sysconfig]# ps -e |grep mysqld

[root@bogon sysconfig]# service mysqld start

Starting mysqld: [ OK ]

[root@bogon sysconfig]# ps -e |grep mysqld

21711 pts/0 00:00:00 mysqld_safe

21816 pts/0 00:00:00 mysqld

教程mysql 安装centos 64bit：