Install pypy on Ubuntu: sudo apt-get install pypy

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Quick installation of pypy:

Step 1: Update system:

	sudo apt-get update

Step 2: Install: pypy

Ater updaing the OS run following command to install the packae:

	sudo apt-get install pypy

Package Details
Package:	pypy
Version:	1.8+dfsg-2
Maintainer:	Ubuntu Developers
Home page:	http://pypy.org/
Description:	fast alternative implementation of Python - PyPy interpreter PyPy is a fast, compliant alternative implementation of the Python language (2.7). It has several advantages and distinct features: Speed: thanks to its Just-in-Time compiler (on x86), Python programs often run faster on PyPy. Memory usage: large, memory-hungry Python programs might end up taking less space than they do in CPython. Compatibility: PyPy is highly compatible with existing Python code. It supports ctypes and can run popular Python libraries like twisted and django. Stackless: PyPy can be configured to run in stackless mode, providing micro-threads for massive concurrency. . This package contains the PyPy interpreter. Homepage: http://pypy.org/
Distro:	Ubuntu 12.04 LTS
Release:
Repo/Section:	universe/python

How to install pypy on Ubuntu 12.04 LTS?

First of all update your system with the command:

sudo apt-get update

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Above command will download the package lists for Ubuntu 12.04 LTS on your system. This will update the list of newest versions of packages and its dependencies on your system.

After downloading the latest package list with the help of above you can run the installation process.

If pypy is not installed on your compter then the command 'dpkg -L pypy' will give followin error.

deepak@deepak-VirtualBox:~$ dpkg -L pypy
Package `pypy' is not installed.
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
deepak@deepak-VirtualBox:~$

Installing pypy:

After system update use the following command to install pypy:

sudo apt-get install pypy

Above command will confirm before installing the package on your Ubuntu 12.04 LTS Operating System. If you are not already logged in as su, installer will ask you the root password. After completion of the installation you can use the package on your system.

How to uninstall/remove pypy from Ubuntu 12.04 LTS?

Now we will see the commands for uninstalling the pypy from Ubuntu 12.04 LTS. For uninstalling this package you can easily use the apt command and remove the package from Linux Operating System.

To remove the pypy following command is used:

sudo apt-get remove  pypy

Following command is used to remove the pypy package along with its dependencies:

sudo apt-get remove --auto-remove pypy

This will remove pypy and all its dependent packages which is no longer needed in the system.

Completely removing pypy with all configuration files:

Following command should be used with care as it deletes all the configuration files and data:

sudo apt-get purge pypy

or you can use following command also:

sudo apt-get purge --auto-remove pypy

Above command will remove all the configuration files and data associated with pypy package. You can can't recover the delete data, so, use this command with care.