如果我输入：
sudo apt-get install apache2
我得到：
Setting up apache2-bin (2.4.7-1ubuntu4.8) ...
Setting up apache2-data (2.4.7-1ubuntu4.8) ...
Setting up apache2 (2.4.7-1ubuntu4.8) ...
ERROR: Config file dir.conf not properly enabled: /etc/apache2/mods-enabled/dir.conf is a real file, not touching it
dpkg: error processing package apache2 (--configure):
subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
Errors were encountered while processing:
apache2
E: Sub-process /usr/bin/dpkg returned an error code (1)
输入：sudo apt-get install -f
输出：
Reading package lists... …