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[root@even ~]# wget  http://mysqltuner.pl/mysqltuner.pl[root@even ~]# chmod +x mysqltuner.pl [root@even ~]# cp mysqltuner.pl /home/mysql/一些简单的命令可从 --help 查阅[mysql@even ~]$ ./mysqltuner.pl  >>  MySQLTuner 1.2.0 - Major Hayden <major@mhtx.net> >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/ >>  Run with \'--help\' for additional options and output filteringPlease enter your MySQL a

   ㈠ 认证和授权         认证：who am I ？   授权：what I can do ？      认证实际上就是一个验证凭证的过程、而进入MySQL 需要出示的凭证有：host、username、password       连接MySQL 常见有 2 种：      ① TCP/IP 连接            加 -h 参数、通过TCP/IP 连接MySQL 实例、mysql.user 对来者

当你安装 MySQL 完后、会有个提示：[root@localhost Desktop]# rpm -ivh MySQL-server-5.5.28-1.rhel5.i386.rpmPreparing...                ########################################### [100%]   1:MySQL-server           ########################################### [100%]PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !To do so, start the server, then issue the following commands:/usr/bin/mysqladmin -u root p