brew install wget 
安装失败
Error: No such file or directory @ rb_sysopen - /Users/dugang/Library/Caches/Homebrew/downloads/53cadfbc33ab403a254f966cda2a95f1294758ec516631535b1af49d4036990b--libunistring-0.9.10.catalina.bottle.tar.gz

下载源码 编译安装
https://ftp.gnu.org/gnu/wget/

./configure --with-ssl=openssl
creating cache ./config.cache
configuring for GNU Wget 1.6
checking host system type... configure: error: can not guess host type; you must specify one

hostname 
uname -a
hostname 
dugang

./configure --with-ssl=openssl  --host=dugang

sudo make install