What is "pkgutil"

Pkgutil, written in Perl and licensed under the GPL, is a tool to make installation of packages in Solaris easier. It handles package dependencies so all required packages are installed before the desired package automatically. This is based on functionality present in apt-get ( Debian Linux).

It is used by OpenCSW (and previously Blastwave), two packaging projects for open source software for Solaris.

In OS X, pkgutil is a different utility used to query and manipulate OS X Installer packages and receipts.