BusyBox已集成命令tftp，可通过tftp上传或下载文件：

Usage: tftp [OPTIONS] HOST [PORT]

Transfer a file from/to tftp server

        -l FILE Local FILE

        -r FILE Remote FILE

        -g      Get file

        -p      Put file

        -b SIZE Transfer blocks of SIZE octets

上传文件：

tftp -p -l  local.sh   192.168.1.222

下载文件：

tftp -g -r remote.sh 192.168.1.222