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I ran the command apt-get update && apt-get -s upgrade | grep 'upgraded' and was displayed the output below.

The following packages will be upgraded:
31 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.

Now below is a screenshot of what the update manager displays

Upgrade manager shows upgrade count 37.

So based on the preceding output I have a total of 34 packages. Does this mean that NEW packages are not attributed towards the count of 31 upgraded and 3 not upgraded because as show below there are what I think to be an additional 3 packages hence bringing the total to 37.

linux-headers-3.2.0-25
linux-headers-3.2.0-25-generic-pae
linux-image-3.2.0-25-generic-pae

Questions

  1. Is my assumption correct?
  2. If it is correct why then do the 3 packages not appear under the count of newly installed?

I am using Ubuntu LTS 12.04

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Try apt-get dist-upgrade and see what it shows you. –  Daniel Andersson Jun 15 '12 at 7:13
    
Also, make sure you have updated the package list in the Update manager so it's not just showing a cached value. –  Daniel Andersson Jun 15 '12 at 7:20
    
@Daniel Andersson - I only noticed the discrepancy after I had run apt-get dist-upgrade so can't now see the difference. I did however update the list in Update Manager and it still showed 37. –  PeanutsMonkey Jun 15 '12 at 7:43
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