Gracias a todos por las respuestas.

Misfour: el upgrade ya lo intenté muchas veces también, y no me aparece nada...


daryo: ha funcionado, se ha instalado sin problemas. Luego me daba este error:
! LaTeX Error: File `mathdesign.sty' not found
Pero lo he arreglado así:
sudo apt-get install texlive-fonts-recommended texlive-fonts-extra

Solucionado, gracias!

Estos son mis repositorios:

# deb cdrom:[Ubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)]/ raring main restricted

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

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

## 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.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe
deb http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-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.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse

## 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.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security 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 precise partner
# deb-src http://archive.canonical.com/ubuntu precise 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 precise main
deb-src http://extras.ubuntu.com/ubuntu precise main

deb http://old-releases.ubuntu.com/ubuntu/ quantal main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ quantal main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu quantal-security main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu quantal-security main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse

Buenas,

Gracias por el feedback.

Ya probé varias veces el -f install pero nada...

Habrá que seguir trasteando a ver

Buenos días,
Estoy intentando tratar de instalar LaTex en Ubuntu 13.04, pero no se por qué razón me está fallando...
El fallo sería el siguiente:

"user@user:~/instalado$ sudo apt-get install texlive-full
.
.
.
Los siguientes paquetes tienen dependencias incumplidas:
 texlive-full : Depende: purifyeps pero no va a instalarse
                Depende: texlive-music (>= 2012.20120516) pero no va a instalarse
E: No se pudieron corregir los problemas, usted ha retenido paquetes rotos."

Ya no se que más puedo hacer...a alguien se le ocurre algo?
Muchas gracias de antemano!