Esto es lo que hay en el sources.list:
Código:
GNU nano 2.2.6 Archivo: /etc/apt/sources.list
#
# deb cdrom:[Ubuntu-Server 15.04 _Vivid Vervet_ - Release i386 (20150422)]/ viv$
#deb cdrom:[Ubuntu-Server 15.04 _Vivid Vervet_ - Release i386 (20150422)]/ vivi$
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://es.archive.ubuntu.com/ubuntu/ vivid main restricted
deb-src http://es.archive.ubuntu.com/ubuntu/ vivid main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://es.archive.ubuntu.com/ubuntu/ vivid-updates main restricted
deb-src http://es.archive.ubuntu.com/ubuntu/ vivid-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://es.archive.ubuntu.com/ubuntu/ vivid universe
deb-src http://es.archive.ubuntu.com/ubuntu/ vivid universe
deb http://es.archive.ubuntu.com/ubuntu/ vivid-updates universe
deb-src http://es.archive.ubuntu.com/ubuntu/ vivid-updates universe