Bom,
apaquei os arquivos no nautilus fechei, entrei no terminal e rolou isso:
dyuliano@ubuntu:~$ apt-get update
E: Não foi possível abrir arquivo de trava /var/lib/apt/lists/lock - open (13: Permissão negada)
E: Impossível criar acesso exclusivo ao directório /var/lib/apt/lists/
E: Não foi possível abrir arquivo de trava /var/lib/dpkg/lock - open (13: Permissão negada)
E: Não foi possível criar acesso exclusivo ao directório de administração (/var/lib/dpkg/), é root?
dyuliano@ubuntu:~$ sudo apt-get update
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http://archive.ubuntu.com natty InRelease
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http://archive.ubuntu.com natty-updates InRelease
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http://archive.ubuntu.com natty-security InRelease
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http://archive.canonical.com natty InRelease
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http://archive.ubuntu.com natty Release.gpg
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http://archive.canonical.com natty Release.gpg
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http://archive.ubuntu.com natty-updates Release.gpg
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http://archive.canonical.com natty Release
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http://archive.ubuntu.com natty-security Release.gpg
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http://archive.canonical.com natty/partner i386 Packages
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http://archive.ubuntu.com natty Release
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http://archive.ubuntu.com natty-updates Release
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http://archive.ubuntu.com natty-security Release
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http://archive.ubuntu.com natty/main Sources [862 kB]
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http://archive.canonical.com natty/partner Translation-pt
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http://archive.ubuntu.com natty/restricted Sources
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http://archive.ubuntu.com natty/universe Sources
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http://archive.ubuntu.com natty/multiverse Sources [155 kB]
84% [1 Sources bzip2 0 B] [2 Sources 909 B/155 kB 0%] 26,0 kB/s 5s
bzip2: Data integrity error when decompressing.
Input file = (stdin), output file = (stdout)
It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.
You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.
Obter:3
http://archive.ubuntu.com natty/main i386 Packages [1.550 kB]
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http://archive.ubuntu.com natty/restricted i386 Packages
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http://archive.ubuntu.com natty/universe i386 Packages [6.021 kB]
30% [3 Packages bzip2 0 B] [4 Packages 15,5 kB/6.021 kB 0%] 25,5 kB/s 3min 55s
bzip2: Data integrity error when decompressing.
Input file = (stdin), output file = (stdout)
It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.
You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.
99% [4 Packages bzip2 0 B] 26,3 kB/s 0s
bzip2: Data integrity error when decompressing.
Input file = (stdin), output file = (stdout)
It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.
You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.
Atingido
http://archive.ubuntu.com natty/multiverse i386 Packages
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http://archive.ubuntu.com natty/main TranslationIndex
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http://archive.ubuntu.com natty/multiverse TranslationIndex
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http://archive.ubuntu.com natty/universe TranslationIndex
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http://archive.ubuntu.com natty-updates/main Sources
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http://archive.ubuntu.com natty-updates/restricted Sources
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http://archive.ubuntu.com natty-updates/universe Sources
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http://archive.ubuntu.com natty-updates/multiverse Sources
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http://archive.ubuntu.com natty-updates/main i386 Packages
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http://archive.ubuntu.com natty-updates/restricted i386 Packages
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http://archive.ubuntu.com natty-updates/universe i386 Packages
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http://archive.ubuntu.com natty-security/main Sources
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http://archive.ubuntu.com natty-security/universe Sources
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http://archive.ubuntu.com natty-security/multiverse Sources
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http://archive.ubuntu.com natty-security/main i386 Packages
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Baixados 8.588 kB em 6min 56s (20,6 kB/s)
W: Falhou ao buscar gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_natty_main_source_Sources Hash Sum incorreto
W: Falhou ao buscar gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages Hash Sum incorreto
W: Falhou ao buscar gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_natty_universe_binary-i386_Packages Hash Sum incorreto
E: Alguns arquivos index falharam ao ser baixados. Eles foram ignorados, ou cópias antigas são usadas ao invés.
dyuliano@ubuntu:~$
o erro continua...