关于ubuntu Apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1 for ServerName

最近在本地虚拟机上安装ubun系统，并打算安装lamp环境，跑一下自己的小项目，但在配置过程中发现重启Apache时提示：Apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1 for ServerName。

于是查找了一下解决方法：

在apache的配置文件：

sudo gedit /etc/apache2/httpd.conf

里面加一行ServerName localhost就OK了;若该文件没有或空则添加一个就可以。
然后我重启apache,发现还是提示这个错误,又百度了一番,发现是apache的默认配置文件apache2.conf中没有引用这个httpd.conf配置文件。

解决办法是在include httpd.conf这个文件:

sudo gedit /etc/apache2/apache2.conf

 找到

# Include module configuration:
Include /etc/apache2/mods-enabled/*.load
Include /etc/apache2/mods-enabled/*.conf
……
# Include ports listing
Include ports.conf
……
# Include generic snippets of statements
Include conf.d/
……
# Include the virtual host configurations:
Include sites-enabled/

 这些语句随便哪里插入:

# Include all the user configurations:
Include httpd.conf