Describes the cause and action for error messages.
Error Message(English)：
ssl connection error github
症状
https://mseeeen.msen.jp/git-ssl-or-nss-connect-error-in-centos-6/#i
試行錯誤
https://mseeeen.msen.jp/git-ssl-or-nss-connect-error-in-centos-6/#i-2
curl を更新
https://mseeeen.msen.jp/git-ssl-or-nss-connect-error-in-centos-6/#4_curl
突然GitHubとhttps通信できなくなったときの解決メモ - Qiita
https://qiita.com/murai-taisuke/items/173b3cbbd697e630047d
GitHub からの clone でエラーが出たので対処した - Qiita
https://qiita.com/bass_ikeda/items/e52aec2d6a4eac8397da
Github unable to access SSL connect error - Stack Overflow
https://stackoverflow.com/questions/48938385/github-unable-to-access-ssl-connect-error
Git pull / push - unable to access HTTPS, SSL ...
https://stackoverflow.com/questions/48938019/git-pull-push-unable-to-access-https-ssl-routines-seem-・・・
git clone https/ssl error
https://stackoverflow.com/questions/19045556/git-clone-https-ssl-error
git and "Server aborted the SSL handshake" errors
https://stackoverflow.com/questions/36936678/git-and-server-aborted-the-ssl-handshake-errors