今天遇到的Ubuntu 10.04 Server 中的LANG设置问题

今天新申请了一个VPS，在其中安装了Ubuntu 10.04
第一次ssh登录上去，遇到这样的问题：

>adduser user

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:

看来是LANG设置有问题，查看一下：

root@www:~# 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.utf8
LC_CTYPE="en_US.utf8"
LC_NUMERIC="en_US.utf8"
LC_TIME="en_US.utf8"
LC_COLLATE="en_US.utf8"
LC_MONETARY="en_US.utf8"
LC_MESSAGES="en_US.utf8"
LC_PAPER="en_US.utf8"
LC_NAME="en_US.utf8"
LC_ADDRESS="en_US.utf8"
LC_TELEPHONE="en_US.utf8"
LC_MEASUREMENT="en_US.utf8"
LC_IDENTIFICATION="en_US.utf8"
LC_ALL=

网上google了一下，编辑/etc/default/locale

LANG="en_US.UTF-8"

再执行locale，情况相同。 装一个strace看看。(节选)

open("/usr/lib/locale/en_US.utf8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_US/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en.utf8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)

看来en_US.utf8还没装呢。
网上google一下， 这个 http://romyli.javaeye.com/blog/853426 情况差不多，不过咱们这里情况更惨点，可以说什么locale都没装。

root@www:~# cd /usr/share/locales/

root@www:/usr/share/locales# ./install-language-pack en_US
Generating locales...
  en_US.UTF-8... done
Generation complete.
dpkg-trigger: dpkg-trigger must be called from a maintainer script (or with a --by-package option)


同样的方法，装上en_US
退出再重新ssh登录进去，看起来就正常了。
再找了一下，直接用 locale-gen 应该也可以。
root@www:~# locale-gen
Generating locales...
  en_US.UTF-8... up-to-date
Generation complete.