Pse explain apt-get msg

["John Fleming" <john@wa9als.com>]

What does it mean when update gets packages, but then upgrade doesn't do
anything?  Thanks!

#apt-get update
Get:1 http://ftp.us.debian.org sarge/main Packages [3124kB]
Hit http://security.debian.org sarge/updates/main Packages
Get:2 http://security.debian.org sarge/updates/main Release [111B]
Get:3 http://ftp.us.debian.org sarge/main Release [81B]
Fetched 3124kB in 22s (137kB/s)
Reading Package Lists... Done
#apt-get dist-upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
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