ghtk@ghtk:/root$ clear
ghtk@ghtk:/root$ sudo aptitude install apache2
[sudo] password for ghtk:
ghtk@ghtk:/root$ whereis apache2
apache2:
ghtk@ghtk:/root$ sudo aptitude install apache2
[sudo] password for ghtk:
The following NEW packages will be installed:
  apache2 apache2-utils{a}
0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/400 kB of archives. After unpacking 913 kB will be used.
Do you want to continue? [Y/n/?]
Selecting previously unselected package apache2-utils.
(Reading database ... 165961 files and directories currently installed.)
Preparing to unpack .../apache2-utils_2.4.10-10+deb8u4_amd64.deb ...
Unpacking apache2-utils (2.4.10-10+deb8u4) ...
Selecting previously unselected package apache2.
Preparing to unpack .../apache2_2.4.10-10+deb8u4_amd64.deb ...
Unpacking apache2 (2.4.10-10+deb8u4) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for systemd (215-17+deb8u3) ...
Setting up apache2-utils (2.4.10-10+deb8u4) ...
Setting up apache2 (2.4.10-10+deb8u4) ...
Enabling module mpm_event.
cp: cannot stat ‘/usr/share/apache2/default-site/index.html’: No such file or directory
dpkg: error processing package apache2 (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for systemd (215-17+deb8u3) ...
Errors were encountered while processing:
 apache2
E: Sub-process /usr/bin/dpkg returned an error code (1)
Failed to perform requested operation on package.  Trying to recover:
Setting up apache2 (2.4.10-10+deb8u4) ...
cp: cannot stat ‘/usr/share/apache2/default-site/index.html’: No such file or directory
dpkg: error processing package apache2 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 apache2