locale sorunu ?

[Mehmet Fatih AKBULUT <mfatihakbulut@gmail.com>]

merhaba,
apt-get ya da aptitude ile gerceklestirdigim butun islemlerde asagidaki hatayi aliyorum: 

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "en_US:en_GB:en",
        LC_ALL = (unset),
        LANG = "en_US"
    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

birkac gun oncesine kadar yoktu boyle birsey ?
sanirim dist-upgrade ettikten sonra birseyler oldu.
bu sorunu nasil giderebilirim ?
yardimci olursaniz sevinirm.