packages não pode ser autenticado! - traceroute

Question

Estou tentando instalar o traceroute no Ubuntu e recebo a seguinte mensagem.

sudo apt-get install traceroute
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  traceroute
0 upgraded, 1 newly installed, 0 to remove and 6 not upgraded.
Need to get 53.1 kB of archives.
After this operation, 162 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  traceroute
Install these packages without verification [y/N]? n
E: Some packages could not be authenticated

mas quando eu instalo no sistema do meu amigo, funciona bem.

sudo apt-get install traceroute
[sudo] password for ankit: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  traceroute
0 upgraded, 1 newly installed, 0 to remove and 12 not upgraded.
Need to get 53.1 kB of archives.
After this operation, 162 kB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu/ precise/universe traceroute amd64 1:2.0.18-1 [53.1 kB]
Fetched 53.1 kB in 1s (28.8 kB/s)     
Selecting previously unselected package traceroute.
(Reading database ... 207690 files and directories currently installed.)
Unpacking traceroute (from .../traceroute_1%3a2.0.18-1_amd64.deb) ...

[1]+  Stopped                 sudo apt-get install traceroute

O que está errado no meu sistema?

Obrigado antecipadamente.

    

Answer 1

Essa mensagem aparece quando seu software não está atualizado. Então faça um ...

sudo apt-get update

e faça a instalação novamente; o aviso deve ter desaparecido.