在CentOS 8中执行yum update，出现报错：

Failed to set locale, defaulting to C.UTF-8

报错原因：没有设置正确的语言环境。
解决方法：

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

Q.E.D.

Life’s too short to be anything but happy.