A general starting point for users of the LCG infrastructure:

What is LCG?

The LHC Computing Grid project prepares the computing infrastructure for the simulation, processing and analysis of LHC data for all four of the LHC collaborations.
Project entry point
Experiment integration support (EIS) homepage
Relevant Group structure in CERN IT division
Administrative structure of the deployment team
Software downloads for site administrators

How can I use it?

The LCG-2 User Guide takes you through the necessary steps for:

1. authentication (by means of a personal digital certificate),
2. registration,
3. authorisation to use LCG resources (via a limited-in-time proxy) and
4. job submission (NB! This point applies to sites using LCG-1. A similar sub-sectioning of the LCG-2 User Guide is in preparation),

The LCG User Scenario explains step-by-step how to submit your job.

Who do I contact in case of problems?

User support is done via the experiment contacts:

• ALICE: Piergiorgio Cerello (cerello@to.infn.it)
• ATLAS: Pending contact names. Provisionally Dario Barberis (Dario.Barberis@cern.ch)
• CMS: Tony Wildish (tony.wildish@cern.ch)
• LHCb: Ian Stokes-Rees (i.stokes-rees1@physics.ox.ac.uk)
• Global Grid User Support (GGUS)
• Intermediate contact in the Deployment Team (support-eis@cern.ch)

All bugs, change requests, problem reports, suggested patches, etc are tracked in the Savannah problem reporting system.

Tools:

Accounting information and Monitoring maps are available from the Grid Operations Centre (GOC).