Where does the "n packages can be upgraded" message come from

[stan]

On Tue, May 17, 2011 at 06:36:27PM +0000, sktsee wrote:
> On Tue, 17 May 2011 13:33:12 -0400, stan wrote:
> 
> [snip]
> > Thanks. I did have /etc/motd.tail, and I removed it. Now I don't get the
> > incorect information, but I also do not get the corect information.
> > 
> > Will the correct information be generated at some point in time?
> 
> Yes. The way it works now is pam_motd is supposed to dynamically generate 
> a motd upon user login if you have this line "session    optional   
> pam_motd.so" in /etc/pam.d/login (and sshd). pam_motd executes via run-
> parts the scripts in /etc/update-motd.d. The 90-updates-available script 
> in turn executes the /usr/lib/update-notifier/update-motd-updates-
> available script.  
> 
> You should be able to update motd by running "apt-get update" and then 
> running the "update-motd-updates-available" manually:
> 
> $ sudo apt-get -qq update
> $ sudo /usr/lib/update-notifier/update-motd-updates-available --force
> 
> 2 packages can be updated.
> 2 updates are security updates.
> 
> Now check /var/run/motd and see if update entries match whatever the 
> update-motd-updates-available script generated.
> 

Thanks for the excelent description of how this works!

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