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|Oracle Solaris 10 8/11 Installation Guide: Custom JumpStart and Advanced Installations Oracle Solaris 10 8/11 Information Library|
To understand what a probe keyword is, you first need to recall what a rule keyword is. A rule keyword is a predefined lexical unit or word that describes a general system attribute, such as host name, hostname, or memory size, memsize. Rule keywords and the values that are associated with them enable you to match a system that has the same attribute to a profile. This match of a system's attributes defines how the Oracle Solaris software is to be installed on each system in the group.
Custom JumpStart, a feature of Oracle Solaris, environment variables, which you use in begin and finish scripts, are set on demand. For example, information about which operating system is already installed on a system is only available in SI_INSTALLED after the installed rule keyword is used.
In some situations, you might need to extract the same information in a begin or finish script for a purpose other than to match a system and run a profile. Probe keywords provide the solution. Probe keywords extract attribute information and remove the need for you to set up a matching condition and run a profile.
For a list of probe keywords and values, see Probe Keywords and Values.