在安装ubuntu的时候选了中文，但后来发现SVN客户端需要utf8来支持中文。
于是修改 /etc/default/locale为：
LANG="en_US.UTF-8" LANGUAGE="en_US:en"
但是，后来perl, locale,export LANG=en_US.UTF-8之类的命令都出现warning：
> locale 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 LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" LC_TIME="en_US.UTF-8" LC_COLLATE="en_US.UTF-8" LC_MONETARY="en_US.UTF-8" LC_MESSAGES="en_US.UTF-8" LC_PAPER="en_US.UTF-8" LC_NAME="en_US.UTF-8" LC_ADDRESS="en_US.UTF-8" LC_TELEPHONE="en_US.UTF-8" LC_MEASUREMENT="en_US.UTF-8" LC_IDENTIFICATION="en_US.UTF-8" LC_ALL=
解决办法：
locale-gen en_US.UTF-8
原文地址：http://blog.csdn.net/lanyd/archive/2010/11/16/6011965.aspx
