问题一：Failed to connect to gitlab.com port 443 after 21606 ms: Couldn't connect to server

问题描述：

在使用git进行推送gitlab仓库时，出现Failed to connect to gitlab.com port 443 after 21606 ms: Couldn't connect to server错误

问题解决：

先试着ping gitlab.com

修改DNS为自动获取

再次ping gitlab.com

git推送成功

问题二：添加.gitignore文件后，想要忽略已经追踪的文件需要删除该追踪文件才能正常忽略

如想忽略文件config.inc.php，该文件在之前的提交中是被追踪的，那么需要执行：

git rm --cached config.inc.php

之后再进行提交，就不会再追踪了

如果是文件夹，则是：

git rm -r --cached directory_name

问题三：error: RPC failed; curl 56 HTTP/2 stream 5 was reset

push时遇到错误：

error: RPC failed; curl 56 HTTP/2 stream 5 was reset
send-pack: unexpected disconnect while reading sideband packet
fatal: the remote end hung up unexpectedly
Everything up-to-date

解决方法：

修改http.version

git config http.version HTTP/1.1