git.sh

#!/bin/bash

# To Install latest Git  using PPA run this command:

sudo add-apt-repository ppa:git-core/ppa
sudo apt update
sudo apt install git

# To check Git version run this command:
git --version

# To Configure Git run this command:
sudo git config --global user.name "yourname"
sudo git config --global user.email "youremail@example.com"

# To check Git configuration settings run this command:
git config --list


# Checking for existing SSH keys
ls -al ~/.ssh
# If you do not see any file name "id_rsa.pub" into a list that means your Ubuntu do not have existing SSH key. 
# if you see any file name "id_rsa.pub" into a list that means you Ubuntu have existing SSH keys. 

# Generating a new SSH key and adding it to the ssh-agent
ssh-keygen -t rsa -b 4096 -C "youremail@example.com"
eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa
cat /home/khaleda/.ssh/id_rsa.pub
# copy the key and add your new SSH key to your GitHub account visit: https://help.github.com/en/articles/adding-a-new-ssh-key-to-your-github-account
# Checking for existing SSH keys
ls -al ~/.ssh
# Now you see a file name "id_rsa.pub" into a list that means you Ubuntu now have existing SSH key. 

# Testing your SSH connection
ssh -T git@github.com
Warning: Permanently added the RSA host key for IP address '192.30.255.113' to the list of known hosts.
Enter passphrase for key '/home/amin/.ssh/id_rsa': 
Hi  badhonhitech! You've successfully authenticated, but GitHub does not provide shell access.