All the software management tools listed in Table 23–1 are used to add and remove software. Admintool, Solaris Product Registry, and the Web Start program are GUI front-ends to the pkgadd and pkgrm commands.
When you add a package, the pkgadd command uncompresses and copies files from the installation media to a local system's disk. When you remove a package, the pkgrm command deletes all files associated with that package, unless those files are also shared with other packages.
Package files are delivered in package format and are unusable as they are delivered. The pkgadd command interprets the software package's control files, and then uncompresses and installs the product files onto the system's local disk.
Although the pkgadd and pkgrm commands do not log their output to a standard location, they do keep track of the product that is installed or removed. The pkgadd and pkgrm commands store information about a package that has been installed or removed in a software product database.
By updating this database, the pkgadd and pkgrm commands keep a record of all software products installed on the system.