I Installed Wordpress under (UBUNTU)
wp-config.php is modified as recommended.
When trying to access
http://x.y.z.a/wordpress/wp-admin/wp-install.php it doesn't open the page but instead downloads the file...
closed as off topic by Su', John Conde♦ Feb 23 '13 at 19:08
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You must have to install
PHP files are rendered in Server like Apache and then it work in web browsers.
PHP is not installed or not configured properly on your server, Install LAMP or install php and configure it manually. There are instructions for doing so here: https://help.ubuntu.com/community/ApacheMySQLPHP
If php is installed but still there is the same issue of being downloaded, it means that the apache/php configuration is not done right.
If you have recently installed any plugins relating to php and apache, make sure to restart apache before the new settings take effect:
If still not working, try to follow the recommendation in here: http://serverfault.com/questions/215455/what-causes-php-pages-to-consistently-download-instead-of-running-normally
If that is too hard because you are not experienced with linux/ubuntu, then you should uninstall apache/php/mysql, and reinstall them again, which should make the appropriate settings, but this time follow a guide from the start like the one posted above.
You need to install PHP5 which is really easy just follow my 5 simple steps and voila your done.
All done and PHP should now work, you may run into MySQL problems if you have not installed this either... let us know if you encounter any more problems and I'll assist.
PHP5 installed but prompted to download php file