http://ubuntuhandbook.org/index.php/2013/09/install-upgrade-to-emacs-24-3-in-ubuntu-13-04-12-10-12-04/
Install / Upgrade Emacs 24.3 via PPA:
Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below command to add the PPA:
sudo add-apt-repository ppa:cassou/emacs
Then update package lists on your system:
sudo apt-get update
After that, you can install or upgrade via synaptic package manager, which is available in Ubuntu Software Center. Or just run below command:
sudo apt-get install emacs24
Enjoy!
http://linuxg.net/how-to-install-git-2-0-on-ubuntu-linux-mint-pinguy-os-and-elementary-os/
Because it is available via PPA, installing Git 2.0 on Ubuntu, Linux Mint and Elementary OS is easy. All you have to do is add the ppa to your system, update the local repository index and install the git package. Like this:
</pre><pre name="code" class="plain">$ sudo add-apt-repository ppa:git-core/ppa
$ sudo apt-get update
$ sudo apt-get install git
Optional, to remove Git 2.0, do:
$ sudo apt-get remove git