在cygwin上安装sdkman

我在cygwin上安装sdkman时遇到问题。说明中说要运行该命令:

curl "https://get.sdkman.io" | bash

在cygwin中运行此命令时,我得到以下结果:

$ curl "https://get.sdkman.io" | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  
                                 Dload  Upload   Total   Spent    Left  
  0     0    0     0    0     0      0      0 --:--:--  0:03:56 --:--:--    

没有下载任何内容,连接最终超时。 你知道为什么会这样吗?可能与防火墙或未正确安装的东西有关?任何解决方案都会很有帮助,谢谢。

更新:

我也尝试了wget,得到了以下结果:

$ wget https://get.sdkman.io
--2018-02-09 13:29:47--  https://get.sdkman.io/
Resolving get.sdkman.io (get.sdkman.io)... 162.243.83.58
Connecting to get.sdkman.io (get.sdkman.io)|162.243.83.58|:443... failed: 
Connection timed out.
Retrying.

--2018-02-09 13:30:09--  (try: 2)  https://get.sdkman.io/
Connecting to get.sdkman.io (get.sdkman.io)|162.243.83.58|:443... failed: 
Connection timed out.
 Retrying.

--2018-02-09 13:30:32--  (try: 3)  https://get.sdkman.io/
Connecting to get.sdkman.io (get.sdkman.io)|162.243.83.58|:443... failed: 
Connection timed out.
Retrying.

--2018-02-09 13:30:56--  (try: 4)  https://get.sdkman.io/
Connecting to get.sdkman.io (get.sdkman.io)|162.243.83.58|:443...