解决安装编译工具gcc后无法连接mysql

在安装编译工具gcc后:

yum -y install make gcc g++ gcc-c++ libtool autoconf automake imake mysql-devel libxml2-devel expat-devel

mysql断开了连接.

查看mysqld.log 日志：

mysql日志
171210 19:38:22 [Note] Plugin 'FEDERATED' is disabled.
171210 19:38:22 InnoDB: The InnoDB memory heap is disabled
171210 19:38:22 InnoDB: Mutexes and rw_locks use GCC atomic builtins
171210 19:38:22 InnoDB: Compressed tables use zlib 1.2.3
171210 19:38:22 InnoDB: Using Linux native AIO
171210 19:38:22 InnoDB: Initializing buffer pool, size = 128.0M
171210 19:38:22 InnoDB: Completed initialization of buffer pool
171210 19:38:22 InnoDB: highest supported file format is Barracuda.
171210 19:38:22  InnoDB: Waiting for the background threads to start
171210 19:38:23 InnoDB: 5.5.55 started; log sequence number 1589339
171210 19:38:23 [ERROR] /usr/libexec/mysqld: unknown variable 'default-character-set=utf8'
171210 19:38:23 [ERROR] Aborting  
171210 19:38:23  InnoDB: Starting shutdown...
171210 19:38:24  InnoDB: Shutdown completed; log sequence number 1589339
171210 19:38:24 [Note] /usr/libexec/mysqld: Shutdown complete

发现是编码问题：

 

修改该文件：