Getting started with Drupal install on the command line:

In a Web browser (firefox), go to http://drupal.org/ and copy the latest drupal version folder location which you want to install. Just right click on download Link and copy to clipboard.

Go to www or public_html or your installation folder usign ssh.

Use Wget command to download drupal from site.
    $ wget <paste link here>

$tar -xzf drupal-6.19.tar.gz

You can create shortcut name for this drupal folder. As some people would like to rename this directory to some simple name.
      You can create a link such as:-
      $ln -s drupal-6.9 drupal

so that you can keep multiple versions in your account at once without getting confused as to which is which.  "ln -s" stands for "link symbolically"

It is now safe to delete the file you downloaded, like so:
      rm drupal-6.19.tar.gz

"rm" stands for "remove." and helpful command for deleting directories. -rf can be used for force delete of directories.

Go to your new URL in a Web browser and follow the directions there.Installation instructions will come up there and you need to follow those.

You can fastely download modules from drupal site to your drupal directory / theme or module directory and enable from drupal GUI. You can also create a script for auto update and installations of modules and themes from drupal site. But need to make sure about backups :-)