Apt не устанавливает наиболее известные пакеты

Я установил новый Ubuntu 14.04.03, и у меня возникает проблема, которой я никогда не сталкивался раньше.

Первое, что я сделал, когда входила в новую установку, было apt-get update и upgrade. Затем я хотел установить apache2, но я получил сообщение об ошибке, что у меня сломанные пакеты.

Я даже не знаю, с чего начать, потому что это никогда не случалось со мной раньше.

EDIT:

sync-s@sync-s:~$ apt-cache policy apache2 apache2-bin ssl-cert
apache2:
  Installed: (none)
  Candidate: 2.4.7-1ubuntu4.5
  Version table:
     2.4.7-1ubuntu4.5 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
apache2-bin:
  Installed: (none)
  Candidate: 2.4.7-1ubuntu4.5
  Version table:
     2.4.7-1ubuntu4.5 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
ssl-cert:
  Installed: (none)
  Candidate: (none)
  Version table:

Попытка установить.

php5:

sync-s@sync-s:~$ sudo apt-get install php5
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 php5 : Depends: libapache2-mod-php5 (>= 5.5.9+dfsg-1ubuntu4.14) but it is not going to be installed or
                 libapache2-mod-php5filter (>= 5.5.9+dfsg-1ubuntu4.14) but it is not going to be installed or
                 php5-cgi (>= 5.5.9+dfsg-1ubuntu4.14) but it is not going to be installed or
                 php5-fpm (>= 5.5.9+dfsg-1ubuntu4.14) but it is not going to be installed
        Depends: php5-common (>= 5.5.9+dfsg-1ubuntu4.14) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Попытка установить mysql-server-5.5:

sync-s@sync-s:~$ sudo apt-get install mysql-server-5.5
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mysql-server-5.5 : Depends: libdbi-perl but it is not installable
                    Depends: mysql-client-5.5 (>= 5.5.46-0ubuntu0.14.04.2) but it is not going to be installed
                    Depends: mysql-server-core-5.5 (>= 5.5.46-0ubuntu0.14.04.2) but it is not going to be installed
                    Recommends: libhtml-template-perl but it is not installable
E: Unable to correct problems, you have held broken packages.

Попытка установить proftpd:

sync-s@sync-s:~$ sudo apt-get install proftpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package proftpd

Содержание / etc /apt/sources.list:

# deb cdrom:[Ubuntu-Server 14.04.3 LTS _Trusty Tahr_ - Beta amd64 (20150805)]/ trusty main restricted

#deb cdrom:[Ubuntu-Server 14.04.3 LTS _Trusty Tahr_ - Beta amd64 (20150805)]/ trusty main restricted

deb http://security.ubuntu.com/ubuntu trusty-security main
deb-src http://security.ubuntu.com/ubuntu trusty-security main
deb http://security.ubuntu.com/ubuntu trusty-security universe
deb-src http://security.ubuntu.com/ubuntu trusty-security universe
deb http://security.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse

## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu trusty partner
deb-src http://archive.canonical.com/ubuntu trusty partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
deb-src http://extras.ubuntu.com/ubuntu trusty main

Попытка установить зависимости apache2:

sync-s@sync-s:~$ sudo apt-get install apache2-bin
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 apache2-bin : Depends: libapr1 (>= 1.5.0) but it is not installable
               Depends: libaprutil1 (>= 1.5.0) but it is not installable
               Depends: libaprutil1-dbd-sqlite3 but it is not installable or
                        libaprutil1-dbd-mysql but it is not installable or
                        libaprutil1-dbd-odbc but it is not installable or
                        libaprutil1-dbd-pgsql but it is not installable or
                        libaprutil1-dbd-freetds but it is not installable
               Depends: libaprutil1-ldap but it is not installable
E: Unable to correct problems, you have held broken packages.
sync-s@sync-s:~$ sudo apt-get install libapr1
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libapr1 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libapr1' has no installation candidate