perl -v 顯示如下：
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:i
LC_ALL = (unset),
LC_CTYPE = "is_IS.ISO_8859-1",
LANG = "zh_TW.Big5"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
This is perl, v5.6.1 built for i386-freebsd
不知如何更改 locale 設定？
謝謝！