有时候在安装完数据库并初始化的时候会出现如下错误：
root@localhost mysql-5.5.19]# bash scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/home/webserver/mysqldata/
Installing MySQL system tables...
120330 16:19:42 [ERROR] Unknown collation: 'utf8-general_ci'
120330 16:19:42 [ERROR] Aborting
120330 16:19:42 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete
Installation of system tables failed! Examine the logs in
/home/webserver/mysqldata/ for more information
造成这种错误原因是在配置参数时utf8-general_ci写错了，应该是utf8_general_ci,
如果不想重新安装数据库那就在my.cnf文件中[mysqld]下面增加一行：
character_set_server=utf8
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