You have mail in /var/mail/root

关闭邮件提醒

随便输入命令就提示You have mail in /var/mail/root，这里提供一下关闭的方法：

You have mail in /var/mail/root
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echo $MAILCHECK		##查看
unset MAILCHECK		##取消

echo "unset MAILCHECK">> /etc/profile && source /etc/profile		##永久取消
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取消自动关闭窗口

echo "export TMOUT=0" >> /etc/profile
source /etc/profile
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