Command = apt-get
Utility = Maintain or upgrade currently installed package

Command line :
delorimier:/# apt-get update
Sample output :
Hit http://non-us.debian.org unstable/non-US/main Packages
Hit http://non-us.debian.org unstable/non-US/main Release
Hit http://non-us.debian.org unstable/non-US/contrib Packages
Hit http://non-us.debian.org unstable/non-US/contrib Release
Hit http://non-us.debian.org unstable/non-US/non-free Packages
Hit http://non-us.debian.org unstable/non-US/non-free Release
Hit http://non-us.debian.org unstable/non-US/main Sources
Ign http://non-us.debian.org unstable/non-US/main Release
Hit http://non-us.debian.org unstable/non-US/contrib Sources
Ign http://non-us.debian.org unstable/non-US/contrib Release
Hit http://non-us.debian.org unstable/non-US/non-free Sources
Ign http://non-us.debian.org unstable/non-US/non-free Release
Hit http://http.us.debian.org unstable/main Packages
Hit http://http.us.debian.org unstable/main Release
Hit http://http.us.debian.org unstable/non-free Packages
Hit http://http.us.debian.org unstable/non-free Release
Hit http://http.us.debian.org unstable/contrib Packages
Hit http://http.us.debian.org unstable/contrib Release
Hit http://http.us.debian.org unstable/main Sources
Ign http://http.us.debian.org unstable/main Release
Hit http://security.debian.org stable/updates/main Packages
Hit http://security.debian.org stable/updates/main Release
Hit http://security.debian.org stable/updates/contrib Packages
Hit http://security.debian.org stable/updates/contrib Release
Hit http://security.debian.org stable/updates/non-free Packages
Hit http://security.debian.org stable/updates/non-free Release
Hit http://http.us.debian.org unstable/non-free Sources
Ign http://http.us.debian.org unstable/non-free Release
Hit http://http.us.debian.org unstable/contrib Sources
Ign http://http.us.debian.org unstable/contrib Release
Reading Package Lists... Done
Building Dependency Tree... Done
Usage :
apt 0.5.3 for linux i386 compiled on Mar  7 2001 19:25:55
Usage: apt-get [options] command
       apt-get [options] install|remove pkg1 [pkg2 ...]
       apt-get [options] source pkg1 [pkg2 ...]

apt-get is a simple command line interface for downloading and
installing packages. The most frequently used commands are update
and install.

Commands:
   update - Retrieve new lists of packages
   upgrade - Perform an upgrade
   install - Install new packages (pkg is libc6 not libc6.deb)
   remove - Remove packages
   source - Download source archives
   build-dep - Configure build-dependencies for source packages
   dist-upgrade - Distribution upgrade, see apt-get(8)
   dselect-upgrade - Follow dselect selections
   clean - Erase downloaded archive files
   autoclean - Erase old downloaded archive files
   check - Verify that there are no broken dependencies

Options:
  -h  This help text.
  -q  Loggable output - no progress indicator
  -qq No output except for errors
  -d  Download only - do NOT install or unpack archives
  -s  No-act. Perform ordering simulation
  -y  Assume Yes to all queries and do not prompt
  -f  Attempt to continue if the integrity check fails
  -m  Attempt to continue if archives are unlocatable
  -u  Show a list of upgraded packages as well
  -b  Build the source package after fetching it
  -c=? Read this configuration file
  -o=? Set an arbitary configuration option, eg -o dir::cache=/tmp
See the apt-get(8), sources.list(5) and apt.conf(5) manual
pages for more information and options.
                       This APT has Super Cow Powers.