Posting in the Magento forums has been disabled pending the implementation of a new and improved forum solution which should better serve the community.
For new questions please post at magento.stackexchange.com, the community-run support site for the Magento community. We will be providing updates on the new forum solution soon. For questions or concerns please email email@example.com.
We have a ubuntu server running with magento and everything was working fine. Then for any reason at server start one morning the server changed ip as he is DHCP activated since then magento is in text only (no color or images) and gives the error when connecting to the back office.