Благодаря момчета,всичко оправих.Не бях забелязал и другия сървър в Software Sources-Other Software
http://repo.mate-desktop.org/debian/ се повтаряше два пъти

.Сега махнах и двете отметки и всичко тръгна.Имам още един въпрос,преди ОС беше на български.Върнах го на английски,но при писането на команди в терминала ми излизат въпросителни:
root@debian:/home/dimitar# apt-get update
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http://ftp.bg.debian.org stable Release.gpg
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http://ftp.bg.debian.org stable Release
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http://ftp.bg.debian.org stable/main Sources
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http://dl.google.com stable Release.gpg
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http://security.debian.org wheezy/updates Release.gpg
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http://ftp.debian.org wheezy-updates Release.gpg
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http://ftp.bg.debian.org stable/contrib Sources
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http://ftp.bg.debian.org stable/non-free Sources
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http://ftp.bg.debian.org stable/main i386 Packages
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http://security.debian.org wheezy/updates Release
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http://dl.google.com stable Release
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http://ftp.bg.debian.org stable/contrib i386 Packages
������
http://ftp.debian.org wheezy-updates Release
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http://ftp.bg.debian.org stable/non-free i386 Packages
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http://ftp.bg.debian.org stable/contrib Translation-en
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http://ftp.bg.debian.org stable/main Translation-en
������
http://ftp.bg.debian.org stable/non-free Translation-en
������
http://security.debian.org wheezy/updates/main Sources
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http://dl.google.com stable/main i386 Packages
������
http://ftp.debian.org wheezy-updates/main Sources
������
http://security.debian.org wheezy/updates/contrib Sources
������
http://ftp.debian.org wheezy-updates/contrib Sources
������
http://security.debian.org wheezy/updates/non-free Sources
������
http://ftp.debian.org wheezy-updates/non-free Sources
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http://security.debian.org wheezy/updates/main i386 Packages
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http://ftp.debian.org wheezy-updates/main i386 Packages/DiffIndex
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http://security.debian.org wheezy/updates/contrib i386 Packages
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http://ftp.debian.org wheezy-updates/contrib i386 Packages
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http://security.debian.org wheezy/updates/non-free i386 Packages
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http://ftp.debian.org wheezy-updates/non-free i386 Packages
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http://security.debian.org wheezy/updates/contrib Translation-en
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http://ftp.debian.org wheezy-updates/contrib Translation-en
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http://security.debian.org wheezy/updates/main Translation-en
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http://ftp.debian.org wheezy-updates/main Translation-en/DiffIndex
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http://security.debian.org wheezy/updates/non-free Translation-en
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http://ftp.debian.org wheezy-updates/non-free Translation-en
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http://dl.google.com stable/main Translation-bg_BG
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http://dl.google.com stable/main Translation-bg
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http://dl.google.com stable/main Translation-en
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root@debian:/home/dimitar#
Написах следното:
LANG=en_EN
LANGUAGE=en_EN:en
Всичко се оправя,но след като затворя терминала и го стартирам наново въпросителните пак излизат.