Experimente o comando abaixo no terminal para instalar o synaptic,
sudo apt-get install aptitude
sudo aptitude install synaptic
Acabei de instalar o Ubuntu 13.04, mas não consigo instalar o Synaptic.
eu tentei estas etapas:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get remove synaptic
sudo apt-get install synaptic
o erro
The following packages have unmet dependencies:
synaptic:i386 : Depends: libgtk-3-0:i386 (>= 3.0.0) but it is not going to be installed
Depends: libvte-2.90-9:i386 (>= 1:0.27.2) but it is not going to be installed
Depends: libxapian22:i386 but it is not going to be installed
Recommends: gksu:i386 but it is not going to be installed or
kdebase-bin:i386 but it is not installable or
policykit-1:i386
Recommends: libgtk2-perl:i386 (>= 1:1.130) but it is not going to be installed
Recommends: rarian-compat:i386 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Experimente o comando abaixo no terminal para instalar o synaptic,
sudo apt-get install aptitude
sudo aptitude install synaptic
primeiro backup
sudo cp /etc/apt/sources.list /etc/apt/sources.list.original
sudo cp /var/lib/dpkg/status /var/lib/dpkg/status.original
faça alguma limpeza
sudo apt-get clean
sudo apt-get autoclean
sudo apt-get -f install
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install synaptic
após a publicação acima - você está feliz agora?