Пакет 'ttf-mscorefonts-installer' не имеет кандидата на установку

У вас есть тег 12.04, но ваш источник.list для 14.04?

Пакет находится в репозиториях мультивселенной.

Отредактируйте sources.list

sudo nano /etc/apt/sources.list

После вашего обновления в вашем вопросе просто удалите # перед каждой строкой, начинающейся с deb, и с записью multiverse

Вот полный список, основанный на вашем list файл для копирования и вставки

## Note, this file is written by cloud-init on first boot of an instance
## modifications made here will not survive a re-bundle.
## if you wish to make changes you can:
## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg
##     or do the same in user-data
## b.) add sources in /etc/apt/sources.list.d
## c.) make changes to template file /etc/cloud/templates/sources.list.tmpl
#

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty main
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty main

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates main
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates main

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty universe
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty universe
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty multiverse
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## 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

deb http://security.ubuntu.com/ubuntu trusty-security main

Сделайте то же самое в /etc/cloud/templates/sources.list.tmpl

После этого

sudo apt-get update
sudo apt-get install ttf-mscorefonts-installer

Специальные примечания для сервера Amazon EC2 Ubuntu

nano /etc/cloud/cloud.cfg

apt_preserve_sources_list: true

/etc/apt/sources.list.d

/etc/cloud/templates/sources.list.tmpl