Why we can't install the ubuntu packages of older versions on new one?

We have learned working on computers in Windows era. So we are habitual of taking the backup of software packages. But this is not suitable for linux systems. In India, we are using windows XP since 2001, the kernel, library hasn't changed since then. So you can install a software on windows XP today which you have tried it 10 years back. But these software may not work on windows 7. The reason is simple, the environment has changed. The kernel, libraries and other supported software have been changed. The same thing happened with Linux based system. For e.g. for every 6 months we get a new version of the Ubuntu Desktop with new kernel and new version of some of the libraries. So the older packages wont work on it. It's best to install the packages using synaptic package manager. If the internet is not available easily then manage to download the Ubuntu DVD which has all the packages in it which are officially supported by Ubuntu. Once you have the DVD, then you need not to download the packages from the internet every time you install it on a new system. In the Software Sources check the option "CDROM with Ubuntu .....". Try this and let me know the results.

How to install packages (software) in Ubuntu/Debian using command line.

Command line is an easy way of installing the softwares on GNU/Linux. Some students come to me and ask for package installation method on Ubuntu. So I just thought of writing few lines on it.

First of all, you must know, most of the packages that will be used on Ubuntu are provided by Ubuntu website itself.
So update the list of the packages. Open the terminal and run the following command.

$ sudo apt-get update

then search a package in the list

$ sudo apt-cache search vlc

.
.

vlc - multimedia player and streamer

Now install the packages

$ sudo apt-get install vlc

Linux Download Links

Don't look around. Download Linux Distro from here:-

 Debian------The most stable Linux distro. 
 Ubuntu------Linux newbie's favourite.
 Mandriva---Easy to manage and lots of graphical tools for administrator.
 Centos------Red Hat's clone.
 Suse---------Novell supported Linux distro.  No need of command line expertise to run this OS,Graphical Interface.
 Fedora-------Funded by Red Hat. 
 Slackware---Freedom to customise each and every thing.
 Linux Mint--Out of box  Linux distro.
 Sabayon

Installing Proxy Server In Ubuntu

Intro

Installing an HTTP proxy cache on your computer can bring several advantages:

It allows sharing of the Internet connection.

The cache will display pages faster, even if you do not share your connection.

It allows to optional filtering utility.

Polipo is an efficient and lightweight HTTP proxy cache.

Quick Installation

sudo apt-get install polipo

Then just configure the software (web browser ...etc) to use localhost:8123 as proxy.

Note that polipo is accessible only from your machine , thus reducing security constraints, however there is more room for modifications or any alternative configurations.

Among the options are:

*Setting the memory and disk cache

*Automatic filtering of HTTP headers such as user-agent, http-referer.

URL filter. 

 

Allowing hosts on the LAN to connect

If your LAN is 192.168.0.0/24 and your proxy server 192.168.0.1, edit the following file /etc/polipo/config and add the lines:

proxyAddress = "192.168.0.1"

allowedClients = 127.0.0.1, 192.168.0.0/24

Then type sudo /etc/init.d/polipo restart to take into account the new configuration.