前 に Debian のパッケージ一覧ファイル Packages.gz を無理やり作るスクリプトを書いたが，
やっぱりそれようのコマンドが用意されてた(T_T)．
その名も
dpkg-scanpackages．どうやって見つけたかというと，

takayuki@sanapon:~$ man -k Packages
Term::ReadLine (3pm) - Perl interface to various readline packages. If no real
package is found, substitutes stubs instead of basic functions.
deb-control (5)      - Debian GNU/Linux packages' master control file format
dh_builddeb (1)      - build debian packages
dh_listpackages (1)  - list binary packages debhelper will act on
dh_movefiles (1)     - move files out of debian/tmp into subpackages
dpkg-name (1)        - rename Debian packages to full package names
dpkg-preconfigure (8) - let packages ask questions prior to their installation
dpkg-scanpackages (8) - create Packages files .
kernel-img.conf (5)  - site wide configuration file for kernel image packages
kernel-package (5)   - A system for creating kernel related packages
make-kpkg (1)        - build Debian kernel packages from Linux kernel sources
perlmod (1p)         - Perl modules (packages and symbol tables)
tasksel (8)          - a user interface for installing task packages
autoconf (1)         - creates scripts to configure source code packages using
templates

そういえばそんな使い方あったねえ＞man

しかし肝心の dpkg-scanpackages の使い方はいまいちよく分からない．

takayuki@sanapon:/var/www/debian/dists/potato$ dpkg-scanpackages
main/binary-i386 /dev/null | gzip > /tmp/Packages.gz

???