Go to this link
http://doc.ez.no/eZ-Publish/Upgrading/Upgrading-to-4.4/Upgrading-from-4.3.x-to-4.4.x

tell me ,in which file i should do step no 2

For eZ OE 5.x and eZ JS Core you will need to replace the following rewrite rules when using Virtual Hosts:

RewriteRule ^/var/cache/texttoimage/.* - [L]
RewriteRule ^/var/[^/]+/cache/(texttoimage|public)/.* - [L]

with:

RewriteRule ^/var/([^/]+/)?cache/(texttoimage|public)/.* - [L]

sorry for this
but from this u can at-least understand .how much this is important for me

What to do in this step ?

Step 3: Upgrading the database

The update script for the database is located in

<eZ Publish root>/update/database/<mysql|postgresql>/4.4/dbupdate-4.3.0-to-4.4.0.sql

You can run this with the appropriate command line tool or application.

i copy .htaccess_root file to .htaccess

i try to access site using following URL

http://192.168.1.206/ezpublish-4.4.0-gpl/index.php/oscar_admin

:(
But get following error

Access denied!

* You do not have permission to access <oscar_admin>.
* Please contact the site administrator.

http://doc.ez.no/eZ-Publish/Upgrading/Upgrading-to-4.4/Upgrading-from-4.3.x-to-4.4.x
After doing all the steps in this link

how to access site ?

In which file , i do following modifications :

Step 2: Custom extensions

If you are using custom extensions, the sub-directories inside the "extension" directory will also have to be copied. However, make sure that you do not overwrite any extensions that are included in eZ Publish, which currently are eZ Online Editor (5.x), eZ OpenOffice.org (2.x) and eZ JSCore (1.x). Note that upgrading the distribution files will overwrite the autoload arrays for extensions. You will need to re-generate the autoload arrays for active extensions later.

See the dedicated upgrade instructions for eZ Flow and Website Interface below.

The updated versions of eZ Flow and Website Interface will also install the following extensions:

*
eZ Website Toolbar
*
eZ Star Rating
*
eZ Google Maps Location

For eZ OE 5.x and eZ JS Core you will need to replace the following rewrite rules when using Virtual Hosts:

RewriteRule ^/var/cache/texttoimage/.* - [L]
RewriteRule ^/var/[^/]+/cache/(texttoimage|public)/.* - [L]

with:

RewriteRule ^/var/([^/]+/)?cache/(texttoimage|public)/.* - [L]

For more detailed instructions, see the dedicated eZ OE and eZ JS Core doc pages.
Note: Both admin2 design and webin (ezwebin extension) requires ezjscore extension to be enabled, look here for how to enabling extensions.

here my new folder is ezpublish-4.4.0-gpl
old folder is UNIVADIS_CMS

can u tell me from where to where i will copy my data in 2) point
:(

Hi
Thankx for reply

i didnt understand following steps
1)eZ Components:
Enterprise edition includes a version of eZ Components that is tested and certified
with this version of eZ Publish-

The community edition requires the latest stable release of eZ Components.
To install this, you also need PEAR
See http://ez.no/ezcomponents for more information

2)Step 1: Upgrading the distribution files

The easiest way to upgrade the distribution files is to unpack eZ Publish 4.4 to a separate directory and then copy the directories that contain site-specific files from the existing installation. Make sure that you copy the following directories:

*
design/example
*
design/example_admin
*
var
*
settings/siteaccess
*
settings/override

but i m not getting ezpublish 4.4 from internet
i m only able to download ezpublish 4.5

if u remove gnome thn u wont be able to access Linux graphically