Why does an error appear every time I try to open the Ubuntu Software Center? [duplicate]

Posted by askubuntu7639 on Ask Ubuntu See other posts from Ask Ubuntu or by askubuntu7639
Published on 2013-10-15T00:40:09Z Indexed on 2013/10/20 16:10 UTC
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software-center

This question already has an answer here:

How do I remove a broken software source? 3 answers

There is a glitch on the Ubuntu Software Center and whenever I open it an error appears and it keeps loading and never opens. Why does this happen? I have installed Ubuntu 13.04 on a disk and partitioned it. Please help me and ask for excess information if you need it. If you know of any duplicates please show me them!! This is the output of a question someone asked me.

SystemError: E:Type '<!DOCTYPE' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list

This next output is the output of cat /etc/apt/sources.list.d/medibuntu.list

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            <div style="float:left; display:block; margin:0 10px 10px 0; border:1px solid #CCCCCC; padding:3px; width:35px; height:35px;"><img alt='' src='http://0.gravatar.com/avatar/ae5f4503d5f167f1cf62d3e36e8242b6?s=35&amp;d=&amp;r=G' class='avatar avatar-35 photo' height='35' width='35' /></div>
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    <h4 class="author">Richard Syme</h4>

    <p class="meta">
        <time datetime="2013-09-24" pubdate>September 24, 2013</time>
        | <a class="permalink" href="http://www.unixmen.com/how-to-customize-you-vlc-hot-keys/#comment-13732">#</a>
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    <div class="content" style="float:left;"><p>I dont have a clear button under the hotkeys. All i want to do is get rid of all hotkeys.</p>

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    <h4 class="author">Abin Thomas Mathew</h4>

    <p class="meta">
        <time datetime="2013-09-24" pubdate>September 24, 2013</time>
        | <a class="permalink" href="http://www.unixmen.com/install-lamp-server-in-centos-6-4-rhel-6-4/#comment-13727">#</a>
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    <div class="content" style="float:left;"><p>Simple and easy to follow tutorial to install and start of phpMyAdmin. Thank you</p>

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            <div style="float:left; display:block; margin:0 10px 10px 0; border:1px solid #CCCCCC; padding:3px; width:35px; height:35px;"><img alt='' src='http://0.gravatar.com/avatar/499ccc1154e9b8569b87413434220b91?s=35&amp;d=&amp;r=G' class='avatar avatar-35 photo' height='35' width='35' /></div>
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    <h4 class="author">SK</h4>

    <p class="meta">
        <time datetime="2013-09-24" pubdate>September 24, 2013</time>
        | <a class="permalink" href="http://www.unixmen.com/munich-giving-ubuntu-linux-cds-citizens/#comment-13725">#</a>
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    <div class="content" style="float:left;"><p>I have Bosslinux and i used it for a while. Now i swiched to Ubuntu 13.04.</p>

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            <div style="float:left; display:block; margin:0 10px 10px 0; border:1px solid #CCCCCC; padding:3px; width:35px; height:35px;"><img alt='' src='http://1.gravatar.com/avatar/3dc2f7140bdd857dcdfe815a6e29aa6b?s=35&amp;d=&amp;r=G' class='avatar avatar-35 photo' height='35' width='35' /></div>
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    <h4 class="author">Anon</h4>

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        <time datetime="2013-09-24" pubdate>September 24, 2013</time>
        | <a class="permalink" href="http://www.unixmen.com/linus-torvalds-talks-backdoor-linuxcon/#comment-13724">#</a>
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    <div class="content" style="float:left;"><p>Do you know how much extra bloat is in Ubuntu these days? How the hell does anyone really know?</p>

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    <h4 class="author"><a href="http://ambitiousgeeks.blogspot.com/" onclick="javascript:_gaq.push(['_trackEvent','outbound-commentauthor','http://ambitiousgeeks.blogspot.com']);"  rel='external nofollow' class='url'>Ambition</a></h4>

    <p class="meta">
        <time datetime="2013-09-24" pubdate>September 24, 2013</time>
        | <a class="permalink" href="http://www.unixmen.com/linus-torvalds-talks-backdoor-linuxcon/#comment-13723">#</a>
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    <div class="content" style="float:left;"><p>True :)</p>

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