How to Install Python 3 in Linux

$ sudo apt-get install build-essential libncursesw5-dev libreadline5-dev libssl-dev libgdbm-dev libbz2-dev libc6-dev libsqlite3-dev tk-dev g++ gcc
Step 2: Grab the bits, extract them and build them

$ wget http://www.python.org/ftp/python/3.0/Python-3.0.tgz
$ tar xvzf Python-3.0.tgz
$ cd Python-3.0/
$ ./configure
$ make
$ sudo make install

Python 3.0 (r30:67503, May 29 2011, 02:31:02)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

10 Things to do immediately after installing Ubuntu or XUbuntu 2011

1. Install Google Chrome

To install Google Chrome you can go to http://www.google.com/chrome and click Download Google Chrome Button and follow the downloading procedure.

or

Applications -> Ubuntu Software Center and Search for "Google Chrome" and you will get Google Chromium Web Browser as search result. Click "Install" to automatically get installed.

2. Install VLC

VLC player is the most downloaded and most distributions supported Video and Audio Player. And VLC supports many video and audio formats.

To download and install, open the terminal and write:

sudo apt-get install vlc

If terminal ask for a password type the root password. 
Note: When you write you will not see the password. 

3. Adobe Flash Player

To view most web pages online you must install Adobe Flash Player. Google Chrome has it's own Adobe Flash Player and you don't need to install Adobe Flash Player if you only use Google Chrome. But for Mozilla Firefox and other browsers you must install Adobe Flash Player.


To install, type in termianl:


sudo apt-get install flashplugin-nonfree

4. Install MPlayer.


Yet, another advanced but very simple video and audio player.


sudo apt-get install mplayer

and

sudo apt-get install w32codecs libdvdcss2

5.  Installing Unrar


sudo apt-get -y install unrar 

Installing Django on UNIX/Linux and Mac OS X

Installation instructions for all UNIX and Linux systems are the same. You need to run the following commands in the directory where the Django-x.xx.tar.gz archive is located. These commands will extract the archive and install Django for you:

$ tar xfz Django-x.xx.tar.gz
$ cd Django-x.xx
$ sudo python setup.py install

or in Debian Distributions,

$ sudo apt-get install python-django

You can test your installation by running this command:

$ django-admin.py --version

Install tor in Ubuntu

Do not use the packages in Ubuntu's universe. They are unmaintained and out of date. That means you'll be missing stability and security fixes.

You'll need to set up our package repository before you can fetch Tor. First, you need to figure out the name of your distribution. A quick command to run is lsb_release -c. Here's a quick mapping:

Ubuntu 10.10 is "maverick"
Ubuntu 10.04 or Trisquel 4.0 is "lucid"
Ubuntu 9.10 or Trisquel 3.5 is "karmic"
Ubuntu 9.04 is "jaunty"
Ubuntu 8.10 is "intrepid"
Ubuntu 8.04 is "hardy"
Debian Etch is "etch"
Debian Lenny is "lenny"

Then add this line to your /etc/apt/sources.list file:
deb http://deb.torproject.org/torproject.org <DISTRIBUTION> main
where you put the codename of your distribution (i.e. etch, lenny, sid, maverick, lucid, karmic, jaunty, intrepid, hardy or whatever it is) in place of <DISTRIBUTION>.
Then add the gpg key used to sign the packages by running the following commands at your command prompt:

gpg --keyserver keys.gnupg.net --recv 886DDD89
gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | sudo apt-key add -

Now refresh your sources and install Tor by running the following commands (as root) at your command prompt:

apt-get update
apt-get install tor tor-geoipdb

To start:
make sure the tor and privoxy services have been started

sudo /etc/init.d/tor start
sudo /etc/init.d/privoxy start

Then start vidalia.....

Short-notes for Linux

Exit GUI and start up again command line CTRL-ALT-BACKSPACE
Shift to command line CTRL-ALT-F1
Shift back to GUI CTRL-ALT-F7
Terminal window and enter the shutdown, halt, or reboot command, halt will log out and shut down your system.
Use CTRL-ALT-F7 to access the first session and CTRL-ALT-F8 for the second session.
To end your session, issue the logout or exit command. This returns you to the login prompt, and Linux waits for another user to log in.
Shut down the system $ shutdown -h now
Reboot CTRL+DEL+ALT
To create a link, hold both the CTRL and SHIFT keys while dragging the icon to the location where you want the link.
The startx command starts the GNOME desktop by default.
Terminal --- $ command-name options arguments
The ls command displays a listing of files in your directory.
CTRL-U erases the whole line and enables you to start over again at the prompt.