Install OpenEMR on Ubuntu 14.04 server

1) Install apache2
#apt-get install apache2
2) Install php5(atleast 5.4 version for OpenEMR)
#apt-get install php5
check the version of th php installed 
#php -v
PHP 5.5.9-1ubuntu4.14 (cli) (built: Oct 28 2015 01:34:46)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies
    with Zend OPcache v7.0.3, Copyright (c) 1999-2014, by Zend Technologies
 
3) Install mysql
#apt-get install mysql-server-5.5
 
4) Install php5-mysql mysql-client
#apt-get install php5-mysql mysql-client

 Modify the php.ini file according to the following
max_execution_time = 60
        max_input_time = 90
        memory_limit = 128M
        display_errors = Off
        log_errors = On
        register_globals = Off
        post_max_size = 30M
        file_uploads = On
        upload_max_filesize = 30M
        error_reporting = E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
        max_input_vars = 3000
        extension_mysql = mysql.so

       
5) download the OpenEMR from sourceforge.
http://sourceforge.net/projects/openemr/files/OpenEMR%20Current/4.2.0.3/openemr-4.2.0.tar.gz/download

6) Extract the tar file
 tar -pxvzf openemr-4.2.0.tar.gz

7) Move extracted files to apache web location
 mv openemr-4.2.0 /var/www/html/openemr

8) Then after go to the local site that is been deployed 
http://localhost/openemr 
        or
http://{ubuntu-server-ip}/openemr

Follow the screens mentioned in the below link
http://www.open-emr.org/wiki/index.php/OpenEMR_4.2.0_Linux_Installation