Failed to set locale, defaulting to C
出现这个问题是由于系统没有正确设置locale环境, 而locale是用于设置本地环境的比如：语言、时区、数字等
locale提示
运行locale命令会出现如下提示
locale: Cannot set LC_CTYPE to default locale: No such file or Directory
locale: Cannot set LC_ALL to default locale: No such file or Directory
解决方案
方案一：设置系统环境变量
echo “export LC_ALL=en_US.UTF-8” >> /etc/profile
source /etc/profile
方案二：设置个人环境变量
echo “export LC_ALL=en_US.UTF-8” >> ~/.bashrc
source ~/.bashrc
