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Possible Duplicate:
What is “dist-upgrade” and why does it upgrade more than “upgrade”?

If I type sudo apt-get update && sudo apt-get upgrade I can only see that the kernel packages are kept back, and not installed. As the screenshot shows.

enter image description here

If I then start the update manager I can install the kernel, with no problems at all. As the second screenshot shows.

enter image description here

Why is this?

Community
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Alvar
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2 Answers2

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This is the difference between upgrade and dist-upgrade. The first never install new packages.

enzotib
  • 96,093
2

This is why!

The kernel is a new package and not an upgrade of an old one, this is why you can't use the command upgrade that upgrades/updates packages. You need to use the command dist-upgrade to install new packages.

When you have updated to the new kernel you can run the old one as well. That's why it's a new package and not just a upgrade.

Alvar
  • 17,038