Yun i cannot install PHP

Hi,
Sorry for my english.
I have an arduino yun with upgraded image. I would like to open index.php, this file is in folder /arduino/www/index.php
My problem is that i can’t install PHP. I read a lot of tutorial.
I can communicate with my Yun via SSH.
When I type “opkg update”,I get this message:

root@Arduino:~# opkg update
Downloading http://download.linino.org/dogstick/all-in-one/latest/packages//Packages.gz.
wget: bad address ‘download.linino.org
Downloading http://download.linino.org/dogstick/all-in-one/latest/packages//Packages.sig.
wget: bad address ‘download.linino.org
Signature check failed.
Remove wrong Signature file.
Collected errors:
* opkg_download: Failed to download http://download.linino.org/dogstick/all-in-one/latest/packages//Packages.gz, wget returned 1.
* opkg_download: Failed to download http://download.linino.org/dogstick/all-in-one/latest/packages//Packages.sig, wget returned 1.
root@Arduino:~#

And when I type “opkg install php5 php5-cgi” I get this:

root@Arduino:~# opkg install php php5-cgi
Unknown package ‘php’.
Unknown package ‘php5-cgi’.
Collected errors:
* opkg_install_cmd: Cannot install package php.
* opkg_install_cmd: Cannot install package php5-cgi.
root@Arduino:~#

Any idea what can i do?
Thanks for a help.

Can you

 ping google.com