2.3.5 Downloaded and cached .deb archive files
If you have manually downloaded package files to your disk (which is not
absolutely necessary, see above for the description of dpkg-ftp or
APT), then after you have installed the packages, you can remove the
.deb files from your system.
If APT is used, these files are cached in the
/var/cache/apt/archives directory. You may erase them after
installation (apt-get clean) or copy them to another machine's
/var/cache/apt/archives directory to save downloading during
subsequent installations.
