apt-cache policy
Arquivos de pacote:
 100 /var/lib/dpkg/status
     release a=now
 500 http://mozilla.debian.net/ squeeze-backports/iceweasel-release amd64 Packages
     origin mozilla.debian.net
 100 http://backports.debian.org/debian-backports/ squeeze-backports/non-free amd64 Packages
     release o=Debian Backports,a=squeeze-backports,n=squeeze-backports,l=Debian Backports,c=non-free
     origin backports.debian.org
 100 http://backports.debian.org/debian-backports/ squeeze-backports/contrib amd64 Packages
     release o=Debian Backports,a=squeeze-backports,n=squeeze-backports,l=Debian Backports,c=contrib
     origin backports.debian.org
 100 http://backports.debian.org/debian-backports/ squeeze-backports/main amd64 Packages
     release o=Debian Backports,a=squeeze-backports,n=squeeze-backports,l=Debian Backports,c=main
     origin backports.debian.org
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/non-free Translation-en
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/main Translation-en
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/contrib Translation-en
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/main amd64 Packages
     release v=6.0-updates,o=Debian,a=proposed-updates,n=squeeze-proposed-updates,l=Debian,c=main
     origin debian.las.ic.unicamp.br
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/non-free amd64 Packages
     release v=6.0-updates,o=Debian,a=proposed-updates,n=squeeze-proposed-updates,l=Debian,c=non-free
     origin debian.las.ic.unicamp.br
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-proposed-updates/contrib amd64 Packages
     release v=6.0-updates,o=Debian,a=proposed-updates,n=squeeze-proposed-updates,l=Debian,c=contrib
     origin debian.las.ic.unicamp.br
 500 http://debian.las.ic.unicamp.br/debian/ squeeze-updates/main amd64 Packages
     release o=Debian,a=stable-updates,n=squeeze-updates,l=Debian,c=main
     origin debian.las.ic.unicamp.br
 500 http://security.debian.org/ squeeze/updates/non-free amd64 Packages
     release v=6.0,o=Debian,a=stable,n=squeeze,l=Debian-Security,c=non-free
     origin security.debian.org
 500 http://security.debian.org/ squeeze/updates/contrib amd64 Packages
     release v=6.0,o=Debian,a=stable,n=squeeze,l=Debian-Security,c=contrib
     origin security.debian.org
 500 http://security.debian.org/ squeeze/updates/main amd64 Packages
     release v=6.0,o=Debian,a=stable,n=squeeze,l=Debian-Security,c=main
     origin security.debian.org
 500 http://debian.las.ic.unicamp.br/debian/ squeeze/main Translation-pt_BR
 500 http://debian.las.ic.unicamp.br/debian/ squeeze/main Translation-pt
 500 http://debian.las.ic.unicamp.br/debian/ squeeze/non-free amd64 Packages
     release v=6.0.5,o=Debian,a=stable,n=squeeze,l=Debian,c=non-free
     origin debian.las.ic.unicamp.br
 500 http://debian.las.ic.unicamp.br/debian/ squeeze/contrib amd64 Packages
     release v=6.0.5,o=Debian,a=stable,n=squeeze,l=Debian,c=contrib
     origin debian.las.ic.unicamp.br
 500 http://debian.las.ic.unicamp.br/debian/ squeeze/main amd64 Packages
     release v=6.0.5,o=Debian,a=stable,n=squeeze,l=Debian,c=main
     origin debian.las.ic.unicamp.br
Pacotes alfinetados ("pinned"):