Distro      URL                         Command
======      ========================    ============================
Debian      (http://www.debian.org)     apt-get install packagename
Ubuntu      (http://ubuntulinux.org)    apt-get install packagename
Suse        (http://www.opensuse.org)   yast -i packagename
Fedora Core (http://fedoraproject.org)  yum install packagename
FreeBSD     (http://www.freebsd.org)    pkg_add -r packagename
Gentoo      (http://www.gentoo.org)     emerge packagename
OpenBSD     (http://www.openbsd.org)    pkg_add -r packagename