Buenas, resulta que esta mañana me e puesto aver si instalaba el winrar y alguna cosa mas en el ubuntu7.04, pero para variar empezamos con los problemas. En primer lugar no puedo actualizar el equipo, cuando le doy sale esto:

Tampoco puedo abrir el gestor de aplicaciones, sale esto:

Tampoco puedo abrir el synaptic, sale esto:

Si intento actualizar desde el gedit, sale esto:

Por ultimo copio el source.list que tengo que yo creo que es el principal problema (como tampoco tengo mucha idea no puedo decir nada...).

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://es.archive.ubuntu.com/ubuntu/ feisty restricted main
deb-src http://es.archive.ubuntu.com/ubuntu/ feisty restricted

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

## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://es.archive.ubuntu.com/ubuntu/ feisty universe
deb-src http://es.archive.ubuntu.com/ubuntu/ feisty 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://es.archive.ubuntu.com/ubuntu/ feisty multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ feisty 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://es.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
# deb-src http://es.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse

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

Me respondo a mi mismo, ya e conseguido solucionarlo, era problema del archivo preferences, tenia que agregarle:

Package: berylPin: version 0.2.0*
Pin-Priority: 990Package: beryl-core
Pin: version 0.2.0*
Pin-Priority: 990
Package: beryl-manager
Pin: version 0.2.0*
Pin-Priority: 990
Package: beryl-plugins
Pin: version 0.2.0*
Pin-Priority: 990
Package: beryl-plugins-data
Pin: version 0.2.0*
Pin-Priority: 990
Package: beryl-settings
Pin: version 0.2.0*
Pin-Priority: 990
Package: beryl-settings-bindings
Pin: version 0.2.0*
Pin-Priority: 990
Package: libberyldecoration0
Pin: version 0.2.0*
Pin-Priority: 990
Package: libberylsettings0
Pin: version 0.2.0*
Pin-Priority: 990
Package: emerald
Pin: version 0.2.0*
Pin-Priority: 990
Package: emerald-themes
Pin: version 0.2.0*
Pin-Priority: 990
Package: libemeraldengine0
Pin: version 0.2.0*
Pin-Priority: 990

como ultimo detalle, el apt-get upgrade debes ejecutarlo como root(sudo apt-get upgrade por ejemplo)

Ok, muchas gracias. Otra cosa queria preguntar al poner en el sources.list los repositorios:

deb http://hendrik.kaju.pri.ee/ubuntu feisty screenlets all
deb-src http://hendrik.kaju.pri.ee/ubuntu feisty screenlets all

Se supone que si ejecuto en la terminal:
wget http://hendrik.kaju.pri.ee/ubuntu/F854AFD7.gpg -O- | sudo apt-key add - && sudo apt-get update

Se deberian actualizar y luego simplemente poiendo:
sudo apt-get install screenlets

Ya deberian estar instalados los screenlets despues de reiniciar, pero cuando voy x el segundo paso me dice unable to connect error 404 en la terminal.

A que puede estar debido?

Un saludo.