[GitHub]- connect to GitHub

we want to update code to Github

First, Generating a new SSH key

1. Open Terminal.
2. Paste the text below, substituting in your GitHub email address.

   $ ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
   

   This creates a new ssh key, using the provided email as a label. And you will see:

   Generating public/private rsa key pair.
   

   When you’re prompted to “Enter a file in which to save the key,” press Enter. This accepts the default file location.

   Enter a file in which to save the key (/home/you/.ssh/id_rsa): [Press enter]
   

   At the prompt, type a secure passphrase. For more information, see “Working with SSH key passphrases”.

   Enter passphrase (empty for no passphrase): [Type a passphrase]
   Enter same passphrase again: [Type passphrase again]

Second, Adding your SSH key to the ssh-agent

Before adding a new SSH key to the ssh-agent to manage your keys, you should have checked for existing SSH keys and generated a new SSH key.

Third, Add the SSH key to your GitHub account

1. copy the public key

   $ sudo apt-get install xclip
   # Downloads and installs xclip. If you don't have `apt-get`, you might need to use another installer (like `yum`)
   
   $ xclip -sel clip < ~/.ssh/id_rsa.pub
   # Copies the contents of the id_rsa.pub file to your clipboard

2. Add the SSH key to your GitHub account
   1. Github.com > Log in > Setting >  click label ‘SSH and GPG keys’ > click button ‘New SSH key ‘
   2. Type title of the key ( For example, if you’re using a personal Mac, you might call this key “Personal MacBook Air”.)
   3. Paste the public key into the “Key” field.
   4. Click button ‘Add SSH key’.

4th, remote to Github

1. git clone your project

   git clone git@github.com:<UserName>/<ProjectName>.git
   

2. Add remote

   cd <ProjectName>
   git remote set-url origin git@github.com:<UserName>/<ProjectName>.git

3. Sometimes, you have to setup your git data

   git config --global user.name "YourName"
   git config --global user.email "YourMail@mail.com"

4. Do some changes in your project
5. Update to GitHub

   git add .
   git commit -m "something"
   git push

if you get below error:

Q1:  fatal: Could not read from remote repository.

fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists

A1:

$ ssh -T git@github.com

#then you would get :
Are you sure you want to continue connecting (yes/no)? [yes]

Hi username! You've successfully authenticated, but GitHub does not
provide shell access.

Q2: Permission denied (publickey).

sign_and_send_pubkey: signing failed: agent refused operation
Permission denied (publickey).

A2:

eval "$(ssh-agent -s)"
ssh-add

****if you until get the error, make sure your “git push” command without sudo