perl 执行时提示告警问题

系统重装后，我执行perl程序，前面提示一个告警：

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

于是安装语言包：

[oracle@newweb2 perl]$ yum install language-pack-cn
Failed to set locale, defaulting to C
Loaded plugins: rhnplugin, security
*Note* Red Hat Network repositories are not listed below. You must run this command as root to access RHN repositories.
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安装失败，但告警没了。- -