Проблема при установке обновлений безопасности и рекомендуемых обновлений с помощью диспетчера обновлений

Я установил UBUNTU 11.04 всего несколько дней назад. Затем, когда я попытался установить пакеты из диспетчера обновлений, я получил следующее сообщение.

*****installArchives() failed: perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_IN.ISO8859-1"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
 Extracting templates from packages: 93%% Extracting templates from packages: 100%%
Preconfiguring packages ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_IN.ISO8859-1"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
 Extracting templates from packages: 93%% Extracting templates from packages: 100%%
Preconfiguring packages ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_IN.ISO8859-1"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
 Extracting templates from packages: 93%% Extracting templates from packages: 100%%
Preconfiguring packages ...
(Reading database ...  (Reading database ... 5%% (Reading database ... 10%% (Reading database ... 15%% (Reading database ... 20%% (Reading database ... 25%% (Reading database ... 30%% (Reading database ... 35%% (Reading database ... 40%% (Reading database ... 45%% (Reading database ... 50%% (Reading database ... 55%% (Reading database ... 60%% (Reading database ... 65%% (Reading database ... 70%% (Reading database ... 75%% (Reading database ... 80%% (Reading database ... 85%% (Reading database ... 90%% (Reading database ... 95%% (Reading database ... 100%% (Reading database ... 157111 files and directories currently installed.)
Preparing to replace ubuntu-docs 11.04.2 (using .../ubuntu-docs_11.04.3_all.deb) ...
Unpacking replacement ubuntu-docs ...
dpkg: ../../src/archives.c:968: tarobject: Assertion `r == stab.st_size' failed.*****

Это также мешает установке из центра программного обеспечения Ubuntu. Может ли кто-нибудь помочь мне с этим?