I am often interested in the installation triggers (postinst, postrm) or certain parts of packages (like /usr/share and /etc). Currently, I am running the next command to retrieve the source code:

apt-get source [package-name]

The downside is, this file is often much bigger than the binary package and does not reflect the installation tree.

Right now, I am downloading the packages through http://packages.ubuntu.com/:

1. Search for [package-name]
2. Select the package
3. Click on amd64/i386 for download
4. Download the actual file

This takes too long for me and as someone who really likes the shell, I would like to do something like the next (imaginary) command:

apt-get get-deb-file [package-name]

I could not find something like this in the apt-get manual page. The most close I found was the --download-only switch, but this puts the package in /var/cache/apt/archives (which requires root permissions) and not in the current directory.