首先访问oracle官方网站下载 http://dev.mysql.com/downloads如下文件：

MySQL-server-5.6.20-1.el6.x86_64.rpm
MySQL-devel-5.6.20-1.el6.x86_64.rpm
MySQL-client-5.6.20-1.el6.x86_64.rpm

然后在Linux中使用root账号执行安装：

[root@Hadoop mysql]# rpm -ivh MySQL-server-5.6.20-1.el6.x86_64.rpm
Preparing... ########################################### [100%]
file /usr/share/mysql/czech/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/danish/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/dutch/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/english/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/estonian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/french/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/german/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/greek/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/hungarian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/italian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/japanese/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/korean/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/norwegian-ny/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/norwegian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/polish/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/portuguese/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/romanian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/russian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/serbian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/slovak/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/spanish/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/swedish/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/ukrainian/errmsg.sys from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/Index.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/armscii8.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/ascii.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp1250.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp1256.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp1257.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp850.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp852.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/cp866.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/dec8.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/geostd8.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/greek.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/hebrew.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/hp8.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/keybcs2.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/koi8r.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/koi8u.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/latin1.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/latin2.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/latin5.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/latin7.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/macce.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/macroman.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/share/mysql/charsets/swe7.xml from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.66-2.el6_3.x86_64
file /usr/bin/my_print_defaults from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-5.1.66-2.el6_3.x86_64
file /usr/share/man/man1/my_print_defaults.1.gz from install of MySQL-server-5.6.20-1.el6.x86_64 conflicts with file from package mysql-5.1.66-2.el6_3.x86_64

出现conflicts，解决办法如下：

[root@Hadoop mysql]# yum -y remove mysql-libs-5.1.66*
Loaded plugins: refresh-packagekit, security
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package mysql-libs.x86_64 0:5.1.66-2.el6_3 will be erased
--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: mysql-devel-5.1.66-2.el6_3.x86_64
--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: 2:postfix-2.6.6-2.2.el6_1.x86_64
--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: mysql-5.1.66-2.el6_3.x86_64
--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: 2:postfix-2.6.6-2.2.el6_1.x86_64
--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: mysql-5.1.66-2.el6_3.x86_64
--> Processing Dependency: libmysqlclient_r.so.16()(64bit) for package: mysql-devel-5.1.66-2.el6_3.x86_64
--> Processing Dependency: libmysqlclient_r.so.16()(64bit) for package: mysql-5.1.66-2.el6_3.x86_64
--> Processing Dependency: libmysqlclient_r.so.16(libmysqlclient_16)(64bit) for package: mysql-5.1.66-2.el6_3.x86_64
--> Processing Dependency: mysql-libs for package: 2:postfix-2.6.6-2.2.el6_1.x86_64
--> Processing Dependency: mysql-libs = 5.1.66-2.el6_3 for package: mysql-5.1.66-2.el6_3.x86_64
--> Running transaction check
---> Package mysql.x86_64 0:5.1.66-2.el6_3 will be erased
---> Package mysql-devel.x86_64 0:5.1.66-2.el6_3 will be erased
---> Package postfix.x86_64 2:2.6.6-2.2.el6_1 will be erased
--> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.4-7.el6.x86_64
--> Processing Dependency: /usr/sbin/sendmail for package: redhat-lsb-core-4.0-7.0.1.el6.x86_64
--> Running transaction check
---> Package cronie.x86_64 0:1.4.4-7.el6 will be erased
--> Processing Dependency: cronie = 1.4.4-7.el6 for package: cronie-anacron-1.4.4-7.el6.x86_64
---> Package redhat-lsb-core.x86_64 0:4.0-7.0.1.el6 will be erased
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-graphics-4.0-7.0.1.el6.x86_64
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0-7.0.1.el6 for package: redhat-lsb-4.0-7.0.1.el6.x86_64
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-printing-4.0-7.0.1.el6.x86_64
--> Running transaction check
---> Package cronie-anacron.x86_64 0:1.4.4-7.el6 will be erased
---> Package redhat-lsb.x86_64 0:4.0-7.0.1.el6 will be erased
--> Processing Dependency: redhat-lsb(x86-64) = 4.0-7.0.1.el6 for package: redhat-lsb-compat-4.0-7.0.1.el6.x86_64
---> Package redhat-lsb-graphics.x86_64 0:4.0-7.0.1.el6 will be erased
---> Package redhat-lsb-printing.x86_64 0:4.0-7.0.1.el6 will be erased
--> Running transaction check
---> Package redhat-lsb-compat.x86_64 0:4.0-7.0.1.el6 will be erased
--> Processing Dependency: /etc/cron.d for package: crontabs-1.10-33.el6.noarch
--> Processing Dependency: /etc/cron.d for package: sysstat-9.0.4-20.el6.x86_64
--> Restarting Dependency Resolution with new changes.
--> Running transaction check
---> Package crontabs.noarch 0:1.10-33.el6 will be erased
---> Package sysstat.x86_64 0:9.0.4-20.el6 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================================================================================
PackageArch Version RepositorySize
============================================================================================================================================================
Removing:
mysql-libs x86_645.1.66-2.el6_3 @anaconda-OracleLinuxServer-201302251503.x86_64/6.44.0 M
Removing for dependencies:
cronie x86_641.4.4-7.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.4166 k
cronie-anacron x86_641.4.4-7.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.4 43 k
crontabs noarch1.10-33.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.42.4 k
mysqlx86_645.1.66-2.el6_3 @anaconda-OracleLinuxServer-201302251503.x86_64/6.42.4 M
mysql-develx86_645.1.66-2.el6_3 @anaconda-OracleLinuxServer-201302251503.x86_64/6.4387 k
postfixx86_642:2.6.6-2.2.el6_1 @anaconda-OracleLinuxServer-201302251503.x86_64/6.49.7 M
redhat-lsb x86_644.0-7.0.1.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.40.0
redhat-lsb-compatx86_644.0-7.0.1.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.40.0
redhat-lsb-corex86_644.0-7.0.1.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.4 22 k
redhat-lsb-graphicsx86_644.0-7.0.1.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.40.0
redhat-lsb-printingx86_644.0-7.0.1.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.40.0
sysstatx86_649.0.4-20.el6 @anaconda-OracleLinuxServer-201302251503.x86_64/6.4807 k

Transaction Summary
============================================================================================================================================================
Remove 13 Package(s)

Installed size: 17 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Erasing: redhat-lsb-compat-4.0-7.0.1.el6.x86_641/13
Erasing: redhat-lsb-4.0-7.0.1.el6.x86_64 2/13
Erasing: mysql-devel-5.1.66-2.el6_3.x86_64 3/13
Erasing: redhat-lsb-graphics-4.0-7.0.1.el6.x86_644/13
Erasing: redhat-lsb-printing-4.0-7.0.1.el6.x86_645/13
Erasing: redhat-lsb-core-4.0-7.0.1.el6.x86_646/13
Erasing: mysql-5.1.66-2.el6_3.x86_64 7/13
/var/tmp/rpm-tmp.aSJ8EY: line 1: lsb_release: command not found
Erasing: sysstat-9.0.4-20.el6.x86_64 8/13
Erasing: crontabs-1.10-33.el6.noarch 9/13
Erasing: cronie-anacron-1.4.4-7.el6.x86_6410/13
Erasing: cronie-1.4.4-7.el6.x86_6411/13
Erasing: 2:postfix-2.6.6-2.2.el6_1.x86_64 12/13
Erasing: mysql-libs-5.1.66-2.el6_3.x86_64 13/13
Verifying: mysql-devel-5.1.66-2.el6_3.x86_64 1/13
Verifying: redhat-lsb-printing-4.0-7.0.1.el6.x86_642/13
Verifying: 2:postfix-2.6.6-2.2.el6_1.x86_643/13
Verifying: redhat-lsb-4.0-7.0.1.el6.x86_64 4/13
Verifying: redhat-lsb-core-4.0-7.0.1.el6.x86_645/13
Verifying: mysql-5.1.66-2.el6_3.x86_64 6/13
Verifying: cronie-anacron-1.4.4-7.el6.x86_64 7/13
Verifying: redhat-lsb-compat-4.0-7.0.1.el6.x86_648/13
Verifying: crontabs-1.10-33.el6.noarch 9/13
Verifying: sysstat-9.0.4-20.el6.x86_6410/13
Verifying: mysql-libs-5.1.66-2.el6_3.x86_64 11/13
Verifying: cronie-1.4.4-7.el6.x86_6412/13
Verifying: redhat-lsb-graphics-4.0-7.0.1.el6.x86_64 13/13

Removed:
mysql-libs.x86_64 0:5.1.66-2.el6_3

Dependency Removed:
cronie.x86_64 0:1.4.4-7.el6cronie-anacron.x86_64 0:1.4.4-7.el6crontabs.noarch 0:1.10-33.el6
mysql.x86_64 0:5.1.66-2.el6_3mysql-devel.x86_64 0:5.1.66-2.el6_3postfix.x86_64 2:2.6.6-2.2.el6_1
redhat-lsb.x86_64 0:4.0-7.0.1.el6redhat-lsb-compat.x86_64 0:4.0-7.0.1.el6 redhat-lsb-core.x86_64 0:4.0-7.0.1.el6
redhat-lsb-graphics.x86_64 0:4.0-7.0.1.el6 redhat-lsb-printing.x86_64 0:4.0-7.0.1.el6 sysstat.x86_64 0:9.0.4-20.el6

Complete!

我这里用的虚拟机是两块网卡，一块host-only，一块NAT，加了NAT以后就可以使用yum的方式去解决冲突了。
然后继续安装

[root@Hadoop mysql]# rpm -ivh MySQL-server-5.6.20-1.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:MySQL-server ########################################### [100%]
2016-05-30 11:07:08 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-05-30 11:07:08 2893 [Note] InnoDB: Using atomics to ref count buffer pool pages
2016-05-30 11:07:08 2893 [Note] InnoDB: The InnoDB memory heap is disabled
2016-05-30 11:07:08 2893 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-05-30 11:07:08 2893 [Note] InnoDB: Memory barrier is not used
2016-05-30 11:07:08 2893 [Note] InnoDB: Compressed tables use zlib 1.2.3
2016-05-30 11:07:08 2893 [Note] InnoDB: Using Linux native AIO
2016-05-30 11:07:08 2893 [Note] InnoDB: Using CPU crc32 instructions
2016-05-30 11:07:08 2893 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2016-05-30 11:07:08 2893 [Note] InnoDB: Completed initialization of buffer pool
2016-05-30 11:07:08 2893 [Note] InnoDB: The first specified data file ./ibdata1 did not exist: a new database to be created!
2016-05-30 11:07:08 2893 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB
2016-05-30 11:07:08 2893 [Note] InnoDB: Database physically writes the file full: wait...
2016-05-30 11:07:08 2893 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB
2016-05-30 11:07:10 2893 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB
2016-05-30 11:07:11 2893 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
2016-05-30 11:07:11 2893 [Warning] InnoDB: New log files created, LSN=45781
2016-05-30 11:07:11 2893 [Note] InnoDB: Doublewrite buffer not found: creating new
2016-05-30 11:07:11 2893 [Note] InnoDB: Doublewrite buffer created
2016-05-30 11:07:11 2893 [Note] InnoDB: 128 rollback segment(s) are active.
2016-05-30 11:07:11 2893 [Warning] InnoDB: Creating foreign key constraint system tables.
2016-05-30 11:07:11 2893 [Note] InnoDB: Foreign key constraint system tables created
2016-05-30 11:07:11 2893 [Note] InnoDB: Creating tablespace and datafile system tables.
2016-05-30 11:07:11 2893 [Note] InnoDB: Tablespace and datafile system tables created.
2016-05-30 11:07:11 2893 [Note] InnoDB: Waiting for purge to start
2016-05-30 11:07:11 2893 [Note] InnoDB: 5.6.20 started; log sequence number 0
A random root password has been set. You will find it in '/root/.mysql_secret'.
2016-05-30 11:07:12 2893 [Note] Binlog end
2016-05-30 11:07:12 2893 [Note] InnoDB: FTS optimize thread exiting.
2016-05-30 11:07:12 2893 [Note] InnoDB: Starting shutdown...
2016-05-30 11:07:13 2893 [Note] InnoDB: Shutdown completed; log sequence number 1625977


2016-05-30 11:07:13 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-05-30 11:07:13 2915 [Note] InnoDB: Using atomics to ref count buffer pool pages
2016-05-30 11:07:13 2915 [Note] InnoDB: The InnoDB memory heap is disabled
2016-05-30 11:07:13 2915 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-05-30 11:07:13 2915 [Note] InnoDB: Memory barrier is not used
2016-05-30 11:07:13 2915 [Note] InnoDB: Compressed tables use zlib 1.2.3
2016-05-30 11:07:13 2915 [Note] InnoDB: Using Linux native AIO
2016-05-30 11:07:13 2915 [Note] InnoDB: Using CPU crc32 instructions
2016-05-30 11:07:13 2915 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2016-05-30 11:07:13 2915 [Note] InnoDB: Completed initialization of buffer pool
2016-05-30 11:07:13 2915 [Note] InnoDB: Highest supported file format is Barracuda.
2016-05-30 11:07:13 2915 [Note] InnoDB: 128 rollback segment(s) are active.
2016-05-30 11:07:13 2915 [Note] InnoDB: Waiting for purge to start
2016-05-30 11:07:13 2915 [Note] InnoDB: 5.6.20 started; log sequence number 1625977
2016-05-30 11:07:14 2915 [Note] Binlog end
2016-05-30 11:07:14 2915 [Note] InnoDB: FTS optimize thread exiting.
2016-05-30 11:07:14 2915 [Note] InnoDB: Starting shutdown...
2016-05-30 11:07:15 2915 [Note] InnoDB: Shutdown completed; log sequence number 1625987




A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER !
You will find that password in '/root/.mysql_secret'.

You must change that password on your first connect,
no other statement but 'SET PASSWORD' will be accepted.
See the manual for the semantics of the 'password expired' flag.

Also, the account for the anonymous user has been removed.

In addition, you can run:

/usr/bin/mysql_secure_installation

which will also give you the option of removing the test database.
This is strongly recommended for production servers.

See the manual for more instructions.

Please report any problems at http://bugs.mysql.com/

The latest information about MySQL is available on the web at

http://www.mysql.com

Support MySQL by buying support/licenses at http://shop.mysql.com

New default config file was created as /usr/my.cnf and
will be used by default by the server when you start it.
You may edit this file to change server settings

[root@Hadoop mysql]# rpm -ivh MySQL-client-5.6.20-1.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:MySQL-client ########################################### [100%]

[root@Hadoop mysql]# rpm -ivh MySQL-devel-5.6.20-1.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:MySQL-devel########################################### [100%]

安装完成后启动mysql服务

[root@Hadoop mysql]# service mysql start
Starting MySQL. SUCCESS!

查看root的随机密码

[root@Hadoop ~]# cat /root/.mysql_secret
# The random password set for the root user at Mon May 30 11:07:12 2016 (local time): wSerJnbKa2UxlRqR

登陆mysql

[root@Hadoop bin]# mysql -u root -pwSerJnbKa2UxlRqR
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.20

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

修改密码

mysql> UPDATE user SET Password=PASSWORD('root') where USER='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4Changed: 4Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

设置远程登陆方法1：

mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql> select host,user from user;
+-----------+------+
| host | user |
+-----------+------+
| % | root |
| 127.0.0.1 | root |
| ::1 | root |
| hadoop | root |
+-----------+------+
4 rows in set (0.00 sec)

方法2:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'youpassword' WITH GRANT OPTIO

之后就可以尝试远程登陆，果然就成功率

C:\Users\lnwxzyp>mysql -uroot -proot -h292.168.56.101
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.20 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

在安装过程中，由于在修改了密码之后没有刷新权限，并且对mysql进行了重启，结果造成登陆的时候出现 如下错误

[root@Hadoop bin]# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

这种情况下，需要设置跳过验证表

[root@Hadoop bin]# mysqld_safe --skip-grant-tables
160530 14:28:31 mysqld_safe Logging to '/var/lib/mysql/Hadoop.err'.
160530 14:28:32 mysqld_safe A mysqld process already exists

然后就可以 mysql -u root mysql 方式登陆了，另外开一个终端

[root@Hadoop ~]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.20 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> UPDATE user SET Password=PASSWORD('root') where USER='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4Changed: 4Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> quit;
Bye
[root@Hadoop ~]#

然后重启mysql之后就正常了。