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Problems with patching Ubuntu server.

Hi
When I log in to my Ubuntu server i get this message:

Code:

8 packages can be updated.

6 updates are security updates.

I then run the following commands:

Code:

sudo apt-get update

and

Code:

sudo apt-get upgrade

But only get this message:

Code:

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following packages have been kept back:

  landscape-common linux-headers-server linux-image-server linux-server

0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.

Why don't I get to install the security patches that clearly is missing?

/Andy.l

Possibly those packages depends on the packages that's kept back. To see what's happening try a simulation:

Code:

apt-get -s dist-upgrade

I don't usually just say "google it" but in this case it works:
http://ubuntuforums.org/showthread.php?t=1110499
The above thread explains why this happens, but for more detail try looking a the documentation for Ubuntu.