内核编译复制配置文件出现问题

root@ubuntu:/home/forlinx/work/kernel# cp arch/arm/configs/ok335xd_evm_linux_defconfig.config
cp: missing destination file operand after 'arch/arm/configs/ok335xd_evm_linux_defconfig.config'
Try 'cp --help' for more information.

.config前有空格