O problema: Toda a vez que tentava instalar algo com o apt-get apareciam algumas mensagens:
erl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = “en_US.UTF-8”
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
Eis a solução, no console:
# locale-gen pt_BR pt_BR.UTF-8
E depois:
# dpkg-reconfigure locales
Fonte e créditos: http://pequenotux.blogspot.com.br/2010/03/perl-warning-setting-locale-failed.html