比如我在windows下用git clone gitURL
就提示  SSL certificate problem: self signed certificate in certificate chain
这种问题，在windows下出现得频率高些。我估计主要是git本身就是基于linux开发的，在windows上，容易缺失一些环境。
1.创建临时环境变量：
windows上命令行输入：
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set GIT_SSL_NO_VERIFY=true git clone  
Linux下：
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env GIT_SSL_NO_VERIFY=true git push  
这里clon可以根据需要换成其他的git命令。
也可以把临时环境变量变为永久的，反正永远不验证ssl证书也没什么风险吧。。。

2.用git自带的配置命令：
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git config --global http.sslVerify false  
linux处理
git问题:Please make sure you have the correct access rights and the repository exists.
当遇到如标题所示问题，打开终端
MBP:baiyunshen_rn lianyu02$ git pull
git@gitlab.intebox.com: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

遇到这种问题怎么处理？很简单
如下：
ssh-keygen -t rsa -C "fangcaiwen",//fangcaiwen是你git操作的账号。
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/lianyu02/.ssh/id_rsa): //回车
Enter passphrase (empty for no passphrase): //回车
Enter same passphrase again: //回车
Your identification has been saved in /Users/lianyu02/.ssh/id_rsa.
Your public key has been saved in /Users/lianyu02/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:oXm37ngA1/jn+dHYsSTrePXNvT9hHEqdjl1ktdW8Z2w fangcaiwen
The key's randomart image is:
+---[RSA 2048]----+
|               .=|
|                B|
|        .o    .=o|
|      .oo..  . =E|
|      ooS.. ..*=+|
|       ......o+@o|
|         ..o o=oB|
|         o. =. o=|
|        .oo..o..=|
+----[SHA256]-----+

然后再执行，
cat /Users/lianyu02/.ssh/id_rsa.pub    //这个路劲在你上面不断回车里可以找到
结果是：ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9+KpKzJKJjFkFABmSAPX74Rjn5qh4jQfbhbXppvIOTMU2fd/ribLQ+mP5Dj89IRAKGyQ/+vwyq0O6Y1e92Rst+Uyd9dgxk+CqK+fAsaHoVF9yCyJBA5eY6IiX5Vh6sbWHKsMfJUNt2rp9MjXrMJjkrxjCaa74iXeUvE9eN3ZRbxyehLP+EOv2nakxyvdao3moiWVHpJb1HdIoJQg9AGz5XqE6BLxegrpte0KJ+knnZtY1FE2Q7WvC/9pu9/IA7JWC8M85CcldR/iwRSDKn9bJesWIi0Og9tRAkRvSEQlr4lSL7fvlPDAV19tIRZ2itpD7uUESjFld05u0MMZjsMN7 fangcaiwen

如果你是gitlab出现这个问题，（github也一样）找到设置，点击SSH keys
如图所示：

按箭头所示.jpg

按图中箭头处粘贴上面的结果，点击增加Add key，然后回终端git pull,完美解决问题