vim /etc/apache2/apache2.conf #在文件最后添加一行 ServerName localhost:80 #然后保存并重启Apache2 service apache2 restart
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.18.0.2. Set the 'ServerName' directive globally to suppress this message
原文：https://www.cnblogs.com/mke2fs/p/13941323.html
