错误描述：

当在centos中使用yum命令时，输出错误：

[root@localhost yum.repos.d]# yum list |grep prce
Failed to set locale, defaulting to C

用locale检测，出现如下提示：

root@localhost yum.repos.d]# 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
LC_CTYPE="en"
LC_NUMERIC="en"
LC_TIME="en"
LC_COLLATE="en"
LC_MONETARY="en"
LC_MESSAGES="en"
LC_PAPER="en"
LC_NAME="en"
LC_ADDRESS="en"
LC_TELEPHONE="en"
LC_MEASUREMENT="en"
LC_IDENTIFICATION="en"
LC_ALL=

错误分析：

查询可知locale是用来设置语言环境的，故此需要查看并正确设置locale

解决方案：

echo "export LC_ALL=en_US.UTF-8" >> /etc/profile

执行命令后重新登录即可