最近在学习Mysql安装，看了好多网上的资料，说了好多第一次用root登陆的方式，都没有成功。
仔细查看了一下安装日志，其实人家是给创建了一个随机密码，并且有提示如何修改密码，完全没那么麻烦。
[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: 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] In