最近在學習Mysql安裝，看了好多網上的資料，說了好多第一次用root登陸的方式，都沒有成功。
仔細查看了一下安裝日志，其實人家是給創建了一個隨機密碼，並且有提示如何修改密碼，完全沒那麼麻煩。
[root@localhost src]# rpm -ivh MySQL-server-5.6.22-1.rhel5.i386.rpm
Preparing... ########################################### [100%]
1:MySQL-server ########################################### [100%]
2015-01-29 09:51:25 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-01-29 09:51:25 28245 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2015-01-29 09:51:25 28245 [Note] InnoDB: The InnoDB memory heap is disabled
2015-01-29 09:51:25 28245 [Note] InnoDB: Mutexes and rw_locks use InnoDB's own implementation
2015-01-29 09:51:25 28245 [Note] InnoDB: Memory barrier is not used
2015-01-29 09:51:25 28245 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-01-29 09:51:25 28245 [Note] InnoDB: Using Linux native AIO
2015-01-29 09:51:25 28245 [Note] InnoDB: Not using CPU crc32 instructions
2015-01-29 09:51:25 28245 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-01-29 09:51:25 28245 [Note] InnoDB: Completed initialization of buffer pool
2015-01-29 09:51:25 28245 [Note] InnoDB: The first specified data file ./ibdata1 did not exist: a new database to be created!
2015-01-29 09:51:25 28245 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB
2015-01-29 09:51:25 28245 [Note] InnoDB: Database physically writes the file full: wait...
2015-01-29 09:51:25 28245 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB
2015-01-29 09:51:25 28245 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB
2015-01-29 09:51:26 28245 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
2015-01-29 09:51:26 28245 [Warning] InnoDB: New log files created, LSN=45781
2015-01-29 09:51:26 28245 [Note] InnoDB: Doublewrite buffer not found: creating new
2015-01-29 09:51:26 28245 [Note] InnoDB: Doublewrite buffer created
2015-01-29 09:51:26 28245 [Note] InnoDB: 128 rollback segment(s) are active.
2015-01-29 09:51:26 28245 [Warning] InnoDB: Creating foreign key constraint system tables.
2015-01-29 09:51:26 28245 [Note] InnoDB: Foreign key constraint system tables created
2015-01-29 09:51:26 28245 [Note] InnoDB: Creating tablespace and datafile system tables.
2015-01-29 09:51:26 28245 [Note] InnoDB: Tablespace and datafile system tables created.
2015-01-29 09:51:26 28245 [Note] InnoDB: Waiting for purge to start
2015-01-29 09:51:26 28245 [Note] InnoDB: 5.6.22 started; log sequence number 0
A random root password has been set. You will find it in '/root/.mysql_secret'.
2015-01-29 09:51:26 28245 [Note] Binlog end
2015-01-29 09:51:26 28245 [Note] InnoDB: FTS optimize thread exiting.
2015-01-29 09:51:26 28245 [Note] InnoDB: Starting shutdown...
2015-01-29 09:51:28 28245 [Note] InnoDB: Shutdown completed; log sequence number 1625977
2015-01-29 09:51:28 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-01-29 09:51:28 28267 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2015-01-29 09:51:28 28267 [Note] InnoDB: The InnoDB memory heap is disabled
2015-01-29 09:51:28 28267 [Note] InnoDB: Mutexes and rw_locks use InnoDB's own implementation
2015-01-29 09:51:28 28267 [Note] InnoDB: Memory barrier is not used
2015-01-29 09:51:28 28267 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-01-29 09:51:28 28267 [Note] InnoDB: Using Linux native AIO
2015-01-29 09:51:28 28267 [Note] InnoDB: Not using CPU crc32 instructions
2015-01-29 09:51:28 28267 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-01-29 09:51:28 28267 [Note] InnoDB: Completed initialization of buffer pool
2015-01-29 09:51:28 28267 [Note] InnoDB: Highest supported file format is Barracuda.
2015-01-29 09:51:28 28267 [Note] InnoDB: 128 rollback segment(s) are active.
2015-01-29 09:51:28 28267 [Note] InnoDB: 5.6.22 started; log sequence number 1625977
2015-01-29 09:51:28 28267 [Note] Binlog end
2015-01-29 09:51:28 28267 [Note] InnoDB: FTS optimize thread exiting.
2015-01-29 09:51:28 28267 [Note] InnoDB: Starting shutdown...
2015-01-29 09:51:30 28267 [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
