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mysql> show variables like 'chara%';  +--------------------------+----------------------------+  | Variable_name            | Value                      |  +--------------------------+----------------------------+  | character_set_client     | utf8                       |  | character_set_connection | utf8                       |  | character_set_database   | latin1                     |  | character_set_filesystem | binary                     |  | character_set_results    | utf8                       |  | character_set_server     | latin1                     |  | character_set_system     | utf8                       |  | character_sets_dir       | /usr/share/mysql/charsets/ |  +--------------------------+----------------------------+  8 rows in set (0.00 sec)

[tomcat@mylinux mysql]$ cat my-small.cnf        # Example MySQL config file for small systems.       #       # This is for a system with little memory (<= 64M) where MySQL is only used       # from time to time and it's important that the mysqld daemon       # doesn't use much resources.       #       # MySQL programs look for option files in a set of       # locations which depend on the deployment platform.       # You can copy this option file to one of those       # locations. For information about these locations, see:       # http://dev.mysql.com/doc/mysql/en/option-files.html       #       # In this file, you can use all long options that a program supports.       # If you want to know which options a program supports, run the program       # with the "--help" option.       # The following options will be passed to all MySQL clients       [client]       #password = your_password       port  = 3306       socket  = /var/lib/mysql/mysql.sock       # Here follows entries for some specific programs       # The MySQL server       [mysqld]       port  = 3306       socket  = /var/lib/mysql/mysql.sock       skip-external-locking       key_buffer_size = 16K       max_allowed_packet = 1M       table_open_cache = 4       sort_buffer_size = 64K       read_buffer_size = 256K       read_rnd_buffer_size = 256K       net_buffer_length = 2K       thread_stack = 128K       # Don't listen on a TCP/IP port at all. This can be a security enhancement,       # if all processes that need to connect to mysqld run on the same host.       # All interaction with mysqld must be made via Unix sockets or named pipes.       # Note that using this option without enabling named pipes on Windows       # (using the "enable-named-pipe" option) will render mysqld useless!       #        #skip-networking       server-id = 1       # Uncomment the following if you want to log updates       #log-bin=mysql-bin       # binary logging format - mixed recommended       #binlog_format=mixed       # Causes updates to non-transactional engines using statement format to be       # written directly to binary log. Before using this option make sure that       # there are no dependencies between transactional and non-transactional       # tables such as in the statement INSERT INTO t_myisam SELECT * FROM       # t_innodb; otherwise, slaves may diverge from the master.       #binlog_direct_non_transactional_updates=TRUE       # Uncomment the following if you are using InnoDB tables       #innodb_data_home_dir = /var/lib/mysql       #innodb_data_file_path = ibdata1:10M:autoextend       #innodb_log_group_home_dir = /var/lib/mysql       # You can set .._buffer_pool_size up to 50 - 80 %       # of RAM but beware of setting memory usage too high       #innodb_buffer_pool_size = 16M       #innodb_additional_mem_pool_size = 2M       # Set .._log_file_size to 25 % of buffer pool size       #innodb_log_file_size = 5M       #innodb_log_buffer_size = 8M       #innodb_flush_log_at_trx_commit = 1       #innodb_lock_wait_timeout = 50       [mysqldump]       quick       max_allowed_packet = 16M       [mysql]       no-auto-rehash       # Remove the next comment character if you are not familiar with SQL       #safe-updates       [myisamchk]       key_buffer_size = 8M       sort_buffer_size = 8M       [mysqlhotcopy]       interactive-timeout       [tomcat@mylinux mysql]$

   查找/etc目录下是否有my.cnf文件；