[How To] Fix “Duplicate sources.list entry” warning?

First of all I wanna update my ubuntu desktop by terminal (I used 12.10), a got an error message and this is it.

W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems

I tried to follow the instruction to run apt-get update, like I did before. but I got the same message,.
and I search to "mbah google", that I called Google.com :D . and I found this. the different is in the duplicate sources.
and here we go to fix my problem,...
just open your terminal again, or you can make a tab.

we knew that the error is in sources.list and google-chrome, just follow the instruction and type the following this on terminal.

ls /etc/apt/sources.list.d/

then will found (in my desktop and it be different on yours),

fyrmir-livewallpaper-daily-quantal.list
google-chrome.list
google-chrome.list.save
google.list
google.list.save
ubuntu-wine-ppa-quantal.list
ubuntu-wine-ppa-quantal.list.save
videolan-stable-daily-quantal.list
videolan-stable-daily-quantal.list.save
virtualbox.list
virtualbox.list.save

and the last step is remove file that make the problem.

sudo rm /etc/apt/sources.list.d/google-chrome.*

and my problem already solved.

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