解决apache启动出现ServerName错误提示[Could not reliably determine the server's fully qualified domain name]

在linux[ubuntu]环境下安装完apache服务器后, 在重启或者启动apache服务器时,会遇到如下警告:

apache2: Could not reliably determine the server's fully qualified domail name, using 127.0.0.1 for ServerName
...waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

遇到这种问题其实也不用着急, 解决方案如下:

找到 /etc/apache2/httpd.conf 文件, 默认情况下这个文件是空的, 只要在里面加入如下的定义语句:
ServerName localhost

保存退出. 然后重新启动Apache2:

service apache2 restart

或者

/etc/init.d/apache2 restart

就会发现, 那样的警告就不会出现了, 参考下图, 问题至此解决.