wget

wget -c http://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.9-linux-glibc2.5-x86_64.tar.gz  默主下载在当前目前      c 断定续传

wget -c http://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.9-linux-glibc2.5-x86_64.tar.gz  -P    /path     指定路径保存

http://man.linuxde.net/wget