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sudo apt-get clean && sudo apt-get update
Atingido:1 http://download.virtualbox.org/virtualbox/debian lucid InRelease
Atingido:2 http://br.archive.ubuntu.com/ubuntu xenial InRelease                
Atingido:3 http://br.archive.ubuntu.com/ubuntu xenial-updates InRelease        
Atingido:4 http://br.archive.ubuntu.com/ubuntu xenial-backports InRelease      
Atingido:5 http://security.ubuntu.com/ubuntu xenial-security InRelease         
Ign:6 http://ppa.launchpad.net/jason-scheunemann/ppa/ubuntu lucid InRelease    
Atingido:7 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial InRelease
Atingido:8 http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu xenial InRelease
Atingido:9 http://ppa.launchpad.net/jason-scheunemann/ppa/ubuntu lucid Release
Obter:10 http://ppa.launchpad.net/jason-scheunemann/ppa/ubuntu lucid Release.gpg [316 B]
Baixados 316 B em 1s (216 B/s)   
Lendo listas de pacotes... Pronto
W: http://download.virtualbox.org/virtualbox/debian/dists/lucid/InRelease: Signature by key 7B0FAB3A13B907435925D9C954422A4B98AB5139 uses weak digest algorithm (SHA1)
W: http://ppa.launchpad.net/jason-scheunemann/ppa/ubuntu/dists/lucid/Release.gpg: Signature by key B7A54DFD57990DE60964F52D932062C9CD30EE56 uses weak digest algorithm (SHA1)

1 Answers1

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Pople will be able to help you in a much better way if you will explain the problem in more detail, like what are you expecting in the answer, Which version of Ubuntu you are using, etc . Simply putting the content of terminal in question won't help you much.

The problem with the VirtualBox source is on VirtualBox's end, but apt-get is just reporting the issue as a warning. This issue does not stop you from upgrading packages.

You are using apt-get and what you are seeing is the normal behaviour after running update: it performs the update but does not provide additional information.

You need to follow sudo apt-get update with sudo apt-get upgrade to see if any package upgrades are available.

The newer sudo apt update (notice it's just apt,and it's only available in Ubuntu 16.04) does provide feedback about the results.

By using apt, you will either see a message that

All packages are up to date

or

The following packages will be upgraded:

BTW your question has been asked here already. I'm just reinstating the answer.