linux下 mysql字符集的修改

 1.查找/etc目录下是否有my.cnf文件；

             #ls -l | grep my.cnf (在/etc下查找是否有my.cnf文件存在)

 2.如果没有就要从/usr/share/mysql,拷贝一个到/etc 下，在/usr/share/mysql目录下有五个后缀为.cnf的文件，分别是 my-huge.cnf    my-innodb-heavy-4G.cnf    my-large.cnf   my-medium.cnf     my-small.cnf ；从中随便拷贝一个到/etc目录下并将其改为my.cnf文件
 3.修改my.cnf文件
     #vi  /etc/my.cnf
     [client]
        default-character-set=utf8
     [mysqld]
        character-set-server=utf8
           [mysql]
        default-character-set=utf8
  
    mysql> show variables like 'character_set%' ;
 +--------------------------+----------------------------+
 | Variable_name            | Value                      |
 +--------------------------+----------------------------+
 | character_set_client     | utf8                       |
 | character_set_connection | utf8                       |
 | character_set_database   | utf8                       |
 | character_set_filesystem | binary                     |
 | character_set_results    | utf8                       |
 | character_set_server     | utf8                       |
 | character_set_system     | utf8                       |
 | character_sets_dir       | /usr/share/mysql/charsets/ |
 +--------------------------+----------------------------+
 mysql>\s
 Server characterset:  utf8 Db     characterset: utf8 Client characterset: utf8 Conn.  characterset: utf8