Editing Stratus VOS (section)

==Interface==
The [[command-line interface]] is the main, and most powerful, user interface for a VOS system.

Users may be locked into "form" based sub-system by command macro scripts<ref name="backup operator">{{cite web|url=http://stratadoc.stratus.com/vos/14.7.1/r285-03/wwhelp/wwhimpl/js/html/wwhelp.htm?context=r285-03&file=ch1r285-03.html |title=Introduction to Backup |website=Stratadoc.stratus.com |accessdate=2016-05-21}}</ref> if required, although a skilled user would be able to break out of this and get command-line access. (It is, in fact, possible for a Stratus system administrator to set up a user's account such that an attempt to break out of FMS—the Stratus Forms Management System—to the command line results in the user being logged out.)

Command macros and programs can be invoked with an argument to display a form listing all the available parameters, which the user can navigate using the "tab" key. Each parameter is generally restricted to control what the user can input. This includes lists of valid values, numeric-only, text-only, etc. Parameters can also be hidden using a "secret" tag, or made mandatory.

All commands in VOS are defined in full with underbars to separate words. For example, {{mono|change_current_dir}} changes the [[working directory]]. The VOS help system uses this convention to assist users who are looking for a subset of possible commands; for instance, those referring to "change" are found by {{mono|[[help (command)|help]] -match change}}.

Users may customize their command interface by means of a file that contains abbreviations for commands. Command abbreviations are conventionally named after the first letters of the command they represent, so {{mono|ccd}} may be expanded to {{mono|change_current_dir foodir}}.