not just this great article, but the whole website is great.
AliYun Code And TortoiseGit
TortoiseGit默认使用TortoiseGitPlink作为ssh客户端（类似putty, 使用ppk格式的key），阿里云居然不支持。先把失败的尝试记录一下：
首先无论用哪个ssh客户端，必须先生成ssh key: id_rsa到默认users\…\.ssh目录下 ，并上传public key到阿里云:
但是git clone总是中途失败，可能网络不好或者别的原因，而且也想用GUI工具，所以拿出TortoiseGit
右键Setting模式用的是Plink:
转换open ssh key到ppk格式
然后用TortoiseGit创建本地Repo空目录, 新增remote配置：
但是fetch或者pull不下来（卡住一段时间后）。报错：fatal: protocol error: bad line length character: Welc， 网上查了一下还是git服务器 response不匹配。
看来阿里云的GitServer真的不支持ppk格式的ssh key。只能放弃， 把图二里的ssh client设定改为默认的C:\Program Files\Git\usr\bin\ssh.exe
然后TortoiseGit就满意了
Reference:
https://help.aliyun.com/document_detail/57904.html 官方
https://developer.aliyun.com/article/483601 改ssh client
https://help.cloudforge.com/hc/en-us/articles/215243143-Configure-TortoiseGIT-client-to-work-with-SSH-keys-on-Windows
iptables reference
不仅介绍了基本的命令行参数和背后的含义，还说明了这个package运行的前置条件：别忘了设置：
#--------------------------------------------------------------- # Load the NAT module # # Note: It is best to use the /etc/rc.local example in this # chapter. This value will not be retained in the # /etc/sysconfig/iptables file. Included only as a reminder. #--------------------------------------------------------------- modprobe iptable_nat #--------------------------------------------------------------- # Enable routing by modifying the ip_forward /proc filesystem file # # Note: It is best to use the /etc/sysctl.conf example in this # chapter. This value will not be retained in the # /etc/sysconfig/iptables file. Included only as a reminder. #--------------------------------------------------------------- echo 1 > /proc/sys/net/ipv4/ip_forward