关于mysql多实例启动的配置问题？请指教！

interliuxing

mysql安装目录：/opt/mysql5155
操作系统         ：centos5.5
my.cnf的配置内容如下：
           [mysqld_multi]
mysqld = /opt/mysql5155/bin/mysqld_safe
mysqladmin = /opt/mysql5155/bin/mysqladmin
user = test
password = test

[client]
port            = 3306
socket          = /tmp/mysql.sock


[mysqld3306]
port            = 3306
socket          = /tmp/mysql3306.sock
pid-file        = /tmp/mysql3306.pid
skip-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
basedir = /opt/mysql5155
datadir = /opt/mysql5155/data
server-id       = 3306


[mysqld3307]
port            = 3307
socket          = /tmp/mysql3307.sock
pid-file        = /tmp/mysql3307.pid
skip-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
basedir = /opt/mysql5155
datadir = /opt/mysql5155/data2
server-id       = 3307


[mysqld3308]
port            = 3308
socket          = /tmp/mysql3308.sock
pid-file        = /tmp/mysql3308.pid
skip-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
basedir = /opt/mysql5155
datadir = /opt/mysql5155/data3
server-id       = 3308


[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



启动时出现的错误提示：


[root@liuxing mysql5155]# ./bin/mysqld_multi --defaults-file=./my.cnf start 3306
WARNING: my_print_defaults command not found.
Please make sure you have this command available and
in your path. The command is available from the latest
MySQL distribution.
ABORT: Can't find command 'my_print_defaults'.
This command is available from the latest MySQL
distribution. Please make sure you have the command
in your PATH.

怎么看配置和路径也没有错啊！请指教！