Setup Git on mountain lion to use github to save your projects

Continuing on my series, today we will be setting up git on our newly upgraded Mountain Lion.
Go ahead and download the latest version of git from here. Go ahead and install it. Next go and open an account on GitHub if you don’t already have one.

We will be using SSH keys to establish a secure connection between our computer and GitHub. Just follow these excellent instructions as described at https://help.github.com/articles/generating-ssh-keys

Just confirm that once you have it setup you can run the following command and see the output as shown below -

$ ssh -T git@github.com  
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)?

Just type yes and hit enter to add the RSA key for github.com to your list of known_hosts. You should then see the following -

Warning: Permanently added 'github.com,207.97.227.239' (RSA) to the
list of known hosts.  
Hi username! You've successfully authenticated, but GitHub does not
provide shell access.

That’s it! You can now checkin and checkout code to GitHub.

If I want to clone the mp3cleaner project from Github, I will cd to the location where I will want the project to be copied. I then run the git clone command.

$ git clone git@github.com:shireenrao/mp3cleaner.git  
Cloning into 'mp3cleaner'...  
remote: Counting objects: 11, done.  
remote: Compressing objects: 100% (9/9), done.  
remote: Total 11 (delta 2), reused 10 (delta 1)  
Receiving objects: 100% (11/11), 4.15 KiB, done.  
Resolving deltas: 100% (2/2), done.

Now you can make any changes or add any files. If you are adding new files you will have to use the command

$ git add filename

to add the file to source control. To commit the changes you made, use the command

$ git commit -a

This will open your favorite editor to make a comment on what you are committing.
Now use this command to push your changes out to GitHub

$ git push

Now if you have a new project you want to push to GitHub, you first login to your github account and create a repository for the project you are working on. You should see a button on the home screen of Github which says “New repository” -

Now fill out the repository name. The other fields are all optional.

Click on the Create repository button to create your repository. Thats all you need to do on github.
For the sake of this article, lets call this repo “Hello-World”

Now back on your mac’s terminal go to where your project lives, initialize your repo locally. Create an empty README file if it doesnt exist already. Add all files to your local repo. Commit your changes and then create a remote named “origin” pointing at your GitHub repo. The last step is to push your changes to github.

$ cd ~/projects/Hello-World  
$ git init  
$ touch README  
$ git add *  
$ git commit -m 'first commit'  
$ git remote add origin https://github.com/username/Hello-World.git  
$ git push origin master

Now if you go see your repository on github, you should see your files there.

Enjoy!