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For the Ubuntu 15.04 category

Fix “The Update Information Is Outdated”

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Sometimes, the message “The Update Information Is Outdated” is displayed when you click on a red warning red icon in the status bar. It happened to me last week. This time, it was caused by a Google Chrome update that failed. First, open a terminal (Control + Alt + T) and run the command

sudo apt-get update

If you get an error message related to Google, you can fix it by editing the /etc/apt/sources.list.d/google-chrome.list file. You can do so by issuing the previously opened terminal window

sudo gedit /etc/apt/sources.list.d/google-chrome.list

Make sure that the repository line looks like

deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main

Change the Ubuntu login screen background?

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Changing the login screen background is easy but not obvious. The image file you want to use as the login screen background must have a read access for everyone. Open the image with the Image viewer installed by default. Select the option Set as Wallpaper from the Image menu.

The Appearance option of the Settings will only let you change the desktop background.

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