Install git on Ubuntu

Install git on Ubuntu

apt-get install libcurl4-gnutls-dev libexpat1-dev gettext \ libz-dev libssl-dev
apt-get install git-core

cd ~/.ssh
ls -al
# Lists the files in your .ssh directory

ssh-keygen -t rsa -C "[email protected]"
# Creates a new ssh key, using the provided email as a label
# Generating public/private rsa key pair.
# Enter file in which to save the key (/home/you/.ssh/id_rsa):

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

Your identification has been saved in /home/you/.ssh/id_rsa.
# Your public key has been saved in /home/you/.ssh/id_rsa.pub.
# The key fingerprint is:
# 01:0f:f4:3b:ca:85:d6:17:a1:7d:f0:68:9d:f0:a2:db [email protected]

ssh-add ~/.ssh/id_rsa

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

Now that you have the key copied, it's time to add it into GitHub:

Test everything out

ssh -T [email protected]
# Attempts to ssh to github
...
Agent admitted failure to sign using the key.
debug1: No more authentication methods to try.
Permission denied (publickey).

The authenticity of host 'github.com (207.97.227.239)' can't be established.
# RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
# Are you sure you want to continue connecting (yes/no)?

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