一、数据初始化-主机名解析错误mysql
系统-Red Hat Enterprise Linux Server release 6.6linux
软件-源码安装MySQL-5.6.27.tar.gzweb
环境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linuxsql
报错：WARNING数据库
[root@rhel6 mysql]# scripts/mysql_install_db --user=mysql
WARNING: The host 'rhel6.myexample.com' could not be looked up with ./bin/resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !bootstrap
缘由：主机名解析错误。less
解决：hosts文件中添加以下内容，ok！ui
[root@rhel6 mysql]# vi /etc/hoststhis
192.168.56.20 rhel6.myexample.comatom
总结：
由于lib库不是很兼容当前MySQL版本。在主机名解析不起做用的状况下，会引发MySQL守护进程、mysqld工做异常，所以在MySQL中受权时须要使用IP地址，而不能使用主机名。
（不解决该问题，依然能够正确执行scripts/mysql_install_db数据库初始化脚本。）
二、数据初始化-时间戳问题
系统-Red Hat Enterprise Linux Server release 6.6
软件-源码安装mysql-5.6.27.tar.gz
环境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
报错：Warning
[root@rhel6 mysql]# scripts/mysql_install_db --user=mysql
Installing MySQL system tables...2015-11-04 07:46:37 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-11-04 07:46:37 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 2867 ...
缘由：机器的系统时间与TIMESTAMP时间戳不匹配。
解决：执行mysql_install_db数据初始化脚本时添加explicit_defaults_for_timestamp选项。
[root@rhel6 mysql]# scripts/mysql_install_db --user=mysql --explicit_defaults_for_timestamp
三、数据初始化-重复安装引发多个配置文件，默认配置文件
系统-Red Hat Enterprise Linux Server release 6.6
软件-源码安装mysql-5.6.27.tar.gz
环境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
报错：Warning
WARNING: Found existing config file ./my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as ./my-new.cnf,
please compare it with your file and take the changes you need.
WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server
缘由：
Warning1是由于重复安装，致使在安装目录下已经存在my.cnf文件。
Warning2是指默认的my.cnf配置文件在/etc/目录下。
启动Mysql server时，可指定--default-file=/path/my.cnf参数来启动mysql服务。
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正确执行的显示：
[root@rhel6 mysql]# scripts/mysql_install_db --user=mysql --explicit_defaults_for_timestamp Installing MySQL system tables...2015-11-04 08:48:03 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 3147 ... 2015-11-04 08:48:03 3147 [Note] InnoDB: Using atomics to ref count buffer pool pages 2015-11-04 08:48:03 3147 [Note] InnoDB: The InnoDB memory heap is disabled 2015-11-04 08:48:03 3147 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2015-11-04 08:48:03 3147 [Note] InnoDB: Memory barrier is not used 2015-11-04 08:48:03 3147 [Note] InnoDB: Compressed tables use zlib 1.2.3 2015-11-04 08:48:03 3147 [Note] InnoDB: Using CPU crc32 instructions 2015-11-04 08:48:03 3147 [Note] InnoDB: Initializing buffer pool, size = 128.0M 2015-11-04 08:48:03 3147 [Note] InnoDB: Completed initialization of buffer pool 2015-11-04 08:48:03 3147 [Note] InnoDB: Highest supported file format is Barracuda. 2015-11-04 08:48:03 3147 [Note] InnoDB: 128 rollback segment(s) are active. 2015-11-04 08:48:03 3147 [Note] InnoDB: Waiting for purge to start 2015-11-04 08:48:03 3147 [Note] InnoDB: 5.6.27 started; log sequence number 1626007 2015-11-04 08:48:11 3147 [Note] Binlog end 2015-11-04 08:48:11 3147 [Note] InnoDB: FTS optimize thread exiting. 2015-11-04 08:48:11 3147 [Note] InnoDB: Starting shutdown... 2015-11-04 08:48:12 3147 [Note] InnoDB: Shutdown completed; log sequence number 1626017 OK Filling help tables...2015-11-04 08:48:12 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 3171 ... 2015-11-04 08:48:12 3171 [Note] InnoDB: Using atomics to ref count buffer pool pages 2015-11-04 08:48:12 3171 [Note] InnoDB: The InnoDB memory heap is disabled 2015-11-04 08:48:12 3171 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2015-11-04 08:48:12 3171 [Note] InnoDB: Memory barrier is not used 2015-11-04 08:48:12 3171 [Note] InnoDB: Compressed tables use zlib 1.2.3 2015-11-04 08:48:12 3171 [Note] InnoDB: Using CPU crc32 instructions 2015-11-04 08:48:12 3171 [Note] InnoDB: Initializing buffer pool, size = 128.0M 2015-11-04 08:48:12 3171 [Note] InnoDB: Completed initialization of buffer pool 2015-11-04 08:48:12 3171 [Note] InnoDB: Highest supported file format is Barracuda. 2015-11-04 08:48:12 3171 [Note] InnoDB: 128 rollback segment(s) are active. 2015-11-04 08:48:12 3171 [Note] InnoDB: Waiting for purge to start 2015-11-04 08:48:12 3171 [Note] InnoDB: 5.6.27 started; log sequence number 1626017 2015-11-04 08:48:12 3171 [Note] Binlog end 2015-11-04 08:48:12 3171 [Note] InnoDB: FTS optimize thread exiting. 2015-11-04 08:48:12 3171 [Note] InnoDB: Starting shutdown... 2015-11-04 08:48:14 3171 [Note] InnoDB: Shutdown completed; log sequence number 1626027 OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER ! To do so, start the server, then issue the following commands: ./bin/mysqladmin -u root password 'new-password' ./bin/mysqladmin -u root -h rhel6.myexample.com password 'new-password' Alternatively you can run: ./bin/mysql_secure_installation which will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd . ; ./bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl cd mysql-test ; perl mysql-test-run.pl 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 ./my.cnf and will be used by default by the server when you start it. You may edit this file to change server settings WARNING: Default config file /etc/my.cnf exists on the system This file will be read by default by the MySQL server If you do not want to use this, either remove it, or use the --defaults-file argument to mysqld_safe when starting the server [root@rhel6 mysql]#