Fast ssh configuration for GitHub in Linux

First of all you have to generate the public key using ssh-keygen

# generate ssh key (press enter for every prompt)
ssh-keygen -o -t rsa -C "random_string_youwant"
# show public key
cat ~/.ssh/id_rsa.pub
# copy the public key (shiftt+ctrl+c)

Then you have to add the public key to your GitHub account. Login into Github and go in <YourProfileImg> -> Settings -> SSH and GPG keys -> New SSH key and paste the public key you have just copied.