# sudo apt-get install apt-file
# sudo apt-file update
# apt-file search /etc/ssh/ssh_config
openssh-client: /etc/ssh/ssh_config
# apt-cache show openssh-client
<snipit>
Package: openssh-client
Priority: standard
Section: net
Installed-Size: 2297
Maintainer: Colin Watson <cjwatson@ubuntu.com>
Original-Maintainer: Debian OpenSSH Maintainers <debian-ssh@lists.debian.org>
Architecture: i386
Source: openssh
Version: 1:5.9p1-5ubuntu1
Replaces: ssh, ssh-krb5
Provides: rsh-client, ssh-client
