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sandro@sandro:~$ apt-cache policy linux-image
linux-image:
  Installed: (none)
  Candidate: 2.6.31.20.33
  Version table:
     2.6.31.20.33 0
        500 http://security.ubuntu.com karmic-security/main Packages
        500 http://archive.ubuntu.com karmic-updates/main Packages
     2.6.31.14.27 0
        500 http://archive.ubuntu.com karmic/main Packages
  1. sandro@sandro:~$ apt-cache policy linux-image
  2. linux-image:
  3.   Installed: (none)
  4.   Candidate: 2.6.31.20.33
  5.   Version table:
  6.      2.6.31.20.33 0
  7.         500 http://security.ubuntu.com karmic-security/main Packages
  8.         500 http://archive.ubuntu.com karmic-updates/main Packages
  9.      2.6.31.14.27 0
  10.         500 http://archive.ubuntu.com karmic/main Packages
go to heaven