我正在使用Windows子系统Ubuntu并设置初级密钥gen，ssh安装等等。当我尝试下载Hadoop时，我收到此错误。
--2018-03-13 16:29:43-- http://apache.mirrors.tds.net/hadoop/common/hadoop-3.0.0/hadoop-3.0.0.tar.gz
Resolving apache.mirrors.tds.net (apache.mirrors.tds.net)... 216.165.129.134
Connecting to apache.mirrors.tds.net (apache.mirrors.tds.net)|216.165.129.134|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 306392917 (292M) [application/x-gzip]
hadoop-3.0.0.tar.gz: Permission denied
Cannot write to ‘hadoop-3.0.0.tar.gz’ (Success).