Once I configured ssh after modifying git at home, and then I couldn't use git again after I returned to the company.

Question

操作步骤是这样的 
1， git add . 
2. git commit -m 'modify' 
3. git fetch origin 


这一步报这个错 
$ git fetch origin 
ssh: connect to host github.com port 22: Connection timed out 
fatal: Could not read from remote repository. 
Please make sure you have the correct access rights and the repository exists. 

求大家帮忙

Answer 1

Add the local ssh public key to the git library.

Answer 2

One-step method, regenerate the public key and then replace the public key

Answer 3

Two possibilities:
1. The company network has disabled SSH port 22
2. The SSH key of the company machine has not been added

Solution:
1. Switch to https protocol or switch to port 443
2. Add public key