第一个问题：怎么也不能将自己本地仓库代码pull到GitHub网站上？
git push origin master
Warning: Permanently added 'github.com,192.30.255.112' (RSA) to the list of known hosts.
To github.com:lanshanxiao/yunweather.git
! [rejected] master -> master (fetch first)
error: failed to push some refs to 'git@github.com:lanshanxiao/yunweather.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
git pull origin master
Warning: Permanently added 'github.com,192.30.255.112' (RSA) to the list of known hosts.
remote: Counting objects: 5, done.
remote: Compressing objects: 100% (4/4), done.
warning: no common commits
remote: Total 5 (delta 0), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (5/5), done.
From github.com:lanshanxiao/yunweather
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
fatal: refusing to merge unrelated histories
git push origin master
Warning: Permanently added 'github.com,192.30.255.112' (RSA) to the list of known hosts.
To github.com:lanshanxiao/yunweather.git
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to 'git@github.com:lanshanxiao/yunweather.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
以上执行了三次，但是都报错，虽然pull下来远程仓库的代码，但是没有
git pull origin master//将本地仓库代码和远程仓库代码融合
如果有下面的报错：
fatal: refusing to merge unrelated histories//说明本地仓库不能和远程仓库代码融合
就强制允许融合：
git pull origin master --allow-unrelated-histories
第二个问题：尽管已经添加了SSH密码到GitHub上，但是还是会出现Permission denied (publickey)？你可能没有将公钥添加到本机上
Warning: Permanently added 'github.com,192.30.255.112' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.
首先，按照百度上的解决步骤，将SSH密码（C:\Users\用户名\.ssh\id_rsa.pub）中的密码加到自己的GitHub网站上，这个可以百度。
再次运行git push origin master 还是出现上面的错误，接下来就是重点：
ssh-agent.exe//运行agent
ssh -vT git@github.com
ssh-add -l//小写字母L
ssh-add
ssh-add -l//小写字母L
上面命令是将ssh运行在本机，并将公钥添加进来。
git ls-files//查看已经提交的文件。