使用git通过https方式从github clone git repo源码时，报错如下：
- Cloning into 'git'...
- fatal: unable to access 'https://github.com/git/git.git/': SSL certificate problem, verify that the CA cert is OK. Details:
- error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
开启curl verbose选项（用于调试）并重新执行git clone，详细报错信息：
- $ export GIT_CURL_VERBOSE=1
- $ git clone https://github.com/git/git.git
- Cloning into 'git'...
- * Couldn't find host github.com in the .netrc file, using defaults
- * About to connect() to github.com port 443
- * Trying 192.30.252.128... * connected
- * Connected to github.com (192.30.252.128) port 443
- * successfully set certificate verify locations:
- * CAfile: /usr/share/ssl/certs/ca-bundle.crt
- CApath: none
- * SSL certificate problem, verify that the CA cert is OK. Details:
- error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
- * Closing connection #0
- fatal: unable to access 'https://github.com/git/git.git/': SSL certificate problem, verify that the CA cert is OK. Details:
- error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
从错误提示可知，git通过curl访问https地址时，未能在本机未找到ca证书，从而导致ssl certificate verify failed。
解决方法：
Setp1：从curl官网下载cacert.pem文件（下载链接参见
这里，关于curl的Server SSL Certificates细节参见
这里，其中提到，从curl 7.18.0开始，编译安装curl时默认安装ca证书，而我机器的curl version=7.12.1，curl --version可查看）：
- ~$ mkdir ~/tools/https-ca
- ~$ cd ~/tools/https-ca
- ~$ curl http://curl.haxx.se/ca/cacert.pem -o cacert.pem
终端执行下面的命令，以便为git配置ca认证信息：
- ~$ git config --global http.sslCAInfo /home/slvher/tools/https-ca/cacert.pem
可打开~/.gitconfig确认cainfo配置成功写入git配置文件
完成以上两步后，执行git clone https://github.com/git/git.git成功，问题解决。
【参考资料】
1. StackOverflow: SSL certificate rejected trying to access GitHub over HTTPS behind firewall
2. cURL: Details on Server SSL Certificates
================== EOF =====================
本站仅提供存储服务，所有内容均由用户发布，如发现有害或侵权内容，请
点击举报。
