解决Linux安装mysql 在/etc下没有my.cnf的问题

# service mysql.server start
Warning: World-writable config file '/etc/my.cnf' is ignored
Starting MySQL SUCCESS! 

151014 11:39:24 mysqld_safe Starting mysqld daemon with databases from /data/mysql/data
Warning: World-writable config file '/etc/my.cnf' is ignored

# ls -la /etc/my.cnf
-rwxrwxrwx 1 root root 1120 Jul 31 10:28 /etc/my.cnf

# ls -la /etc/my.cnf
-rwxrwxrwx 1 root root 1120 Jul 31 10:28 /etc/my.cnf
# 
# 
# chmod 644 /etc/my.cnf
# 
# ls -la /etc/my.cnf
-rw-r--r-- 1 root root 1120 Jul 31 10:28 /etc/my.cnf
# 

151014 14:05:54 mysqld_safe mysqld from pid file /data/mysql/data/yq-xg-dev122.pid ended
151014 14:06:08 mysqld_safe Starting mysqld daemon with databases from /data/mysql/data
151014 14:06:08 [Note] Plugin 'FEDERATED' is disabled.
151014 14:06:08 InnoDB: The InnoDB memory heap is disabled
151014 14:06:08 InnoDB: Mutexes and rw_locks use GCC atomic builtins
151014 14:06:08 InnoDB: Compressed tables use zlib 1.2.3
151014 14:06:08 InnoDB: Using Linux native AIO
151014 14:06:08 InnoDB: Initializing buffer pool, size = 128.0M
151014 14:06:08 InnoDB: Completed initialization of buffer pool
151014 14:06:08 InnoDB: highest supported file format is Barracuda.
151014 14:06:08 InnoDB: Waiting for the background threads to start
151014 14:06:09 InnoDB: 1.1.8 started; log sequence number 18872844901
151014 14:06:09 [Warning] 'proxies_priv' entry '@ root@xinge122' ignored in --skip-name-resolve mode.
151014 14:06:09 [Note] Event Scheduler: Loaded 0 events
151014 14:06:09 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.5.19-log' socket: '/tmp/mysql.sock' port: 3306 MySQL Community Server (GPL)