mysql.cnf配置后启动不了问题

在启动时如果不创建mysql.cnf文件启动正常，如果创建mysql.cnf后启动就报下面的错误
错误：
nas:/mnt/mysql# error: Found option without preceding group in config file: /mnt/mysql/my.cnf at line: 1
Fatal error in defaults handling. Program aborted
error: Found option without preceding group in config file: /mnt/mysql/my.cnf at line: 1
Fatal error in defaults handling. Program aborted
mysql.cnf 配置文件中的内容：
max_heap_table_size=64000000
max_connections=1000
max_tmp_tables=128
server-id =1
log-bin=mysql-bin
binlog-do-db=radius
binlog-ignore-db=mysql