https://tyler.io/so-uh-i-think-catalina-10154-broke-ssh/
方案一
.ssh/config文件添加 ProxyCommand nc %h %p
如：
host vps
hostname xx.xxx.com
user root
ProxyCommand nc %h %p
方案二
brew install openssh
~/.bash_profile 添加: export PATH="/usr/local/sbin:$PATH"
source ~/.bash_profile
