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I have installed Ubuntu 12.04 version earlier, but when I wants to play MP3, mp3 or any kind of media, an messages shows that you have not installed codec, decoder for these type of file.

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Welcome to AskUbuntu! You may want to check out this question on media codecs and then add to your post if none of the options work, hope this helps. – Oyibo Oct 28 '12 at 15:08

By default, the codecs are not installed when you install Ubuntu. If you need to install them on a computer that doesn't have internet connection, you have to use a tool like Apt on cd ( on a computer with internet connection to create a repository disk media and use it to install the packages on the computer without internet connection.

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