Select Journal - First Quarter 2013 - (Page 17)

Introduction to Oracle Enterprise Manager Command Line Interface Figure 1 By Ray Smith O racle Enterprise Manager Command Line Interface (EMCLI) performs OEM tasks without clicking through the GUI console. This brief paper will introduce general concepts of EMCLI and illustrate its use. Technical Background Architecture Oracle Management Service (OMS) is the heart of OEM 12c Cloud Control. The OMS is a J2EE application running on a dedicated Fusion server. An EMCLI extension runs concurrently with the console and upload management services to handle command-line calls to the OMS, acting as a headless OMS. It performs the same tasks but returns text streams instead of pretty pictures. Each EMCLI command is exercised in the EMCLI Java module through the use of verbs. The documentation clearly provides the list of required and optional parameters for each verb, with an example for nearly all verbs. The trick, of course, is turning this knowledge into something useful. Working with EMCLI The EMCLI utility is invoked by calling it by name, just like SQLPLUS, EXPDP, RMAN and other Oracle utilities. Unlike sqlplus, EMCLI does not require a subshell1 when used in a shell script. You simply call it by name like any other UNIX utility (Figures 2 and 3). Figure 2 Verbs Today there are 333 EMCLI verbs, and Oracle continues to expose more of them as users request them. Each verb is well-documented in Oracle Document 17786-02 and at the command line using this syntax: EMCLI -help EMCLI –help You can also refer to the online reference through the setup drop-down in OEM, as shown in Figure 1. Figure 3 Login and Logout Basic EMCLI verbs help, setup and status don’t require authentication with OMS because they relate to the EMCLI utility itself. Any other commands require a login and, of course, a logout when your session is complete. oracle@myoemserver> emcli login –user=sysman –pass=abc123! oracle@myoemserver> emcli logout 1 A Shell scripts run SQLPLUS calls in a subshell ( <Table of Contents for the Digital Edition of Select Journal - First Quarter 2013 Select Journal - First Quarter 2013
Table of Contents
From the Editor
From the IOUG President
Enterprise Manager 12c Cloud Control: What’s Changed, What’s New
Introduction to Oracle Enterprise Manager Command Line Interface
Users Group Calendar
Retrieving Large Volumes of Data
A Multilayered Approach to Oracle Database Availability
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Select Journal - First Quarter 2013