1.2 Getting a Computing Account

Complete: 5
Detailed Review status


Getting a CERN Account

You must get a CERN computer account (also called a SSO i.e. SingleSignOn account).

All CMS collaborators are eligible for a CERN Unix account (often called lxplus or afs account) and a CERN email account (often called a nice account), and are entitled to use CERN computing resources.

Currently CERN has a single account for all those services (also called SSO i.e. SingleSignOn account).

Register as CERN User

Before applying for an account, make sure that you are registered as a CERN user (see here and as a CMS member correctly. Your responsible (for users, Team Leader, Group Leader of the institute and for COAS and VISC the Department Head or an authorized person on his/her behalf) has to initiate the online registration via the Pre-Registration Tool PRT.

Make sure you are registered as a USER and NOT as VISITOR or EXTERNAL. Only a USER status will give you access with all computing privileges and resources to work like grid certificate, CMS twikis (internal twikis requiring login), indico, hypernews etc.

NOTE: Without a valid passport as an ID, one cannot register as a USER.

After CERN registration

Once you are registered in the CERN Human Resource database, your Primary CERN Account, CERN e-mail address & mailbox are created automatically. Since you are registered with CMS Experiment, you will get an email from cms.people@cernNOSPAMPLEASE.ch with instructions about next steps.

You can read some more info here.

NOTE: Information given below is useful AFTER you get registered at CERN and have a CMS computing account.

lxplus (afs)

To access Linux interactive farm use

ssh   yourloginname@lxplus.cern.ch 


To access the NICE/windows services you can go to https://winservices.cern.ch.


You can set up the mailserver from https://mmm.cern.ch.

Your e-mail address will be of the general form (GEM) "firstname.lastname@cern.ch" which is an alias normally pointing to your e-mail box (PEM) "loginname@mail.cern.ch". The following conventions apply:

  • If a second initial (or name) is included in the e-mail address, it is separated by dots.
  • If the name consists of separate parts, a dot is used between the parts, instead of a blank.

Administrative Information Services (ais, edh)

You can access the Administrative Information Services (ais) and the applications therein (such as edh: Electronic Document Handling System) with your common password. To login into edh go to https://edh.cern.ch. A separate edh signature password is needed to accept or reject edh documents. You acquire this password from ais.support@cernNOSPAMPLEASE.ch (remove SPAMNOT) and it can be changed on the edh page where "settings" and "authorisation password" are.

The edh signature password is needed also for acquiring access rights to radiation or underground areas. You may also need extra safety courses (https://sir.cern.ch) as well.

There are several courses. The lowest safety level course and computer related course are required to perform activities on the CERN site(s) and access CERN Computing system. As part of the CERN registration you will be asked to go through those courses.

Further information

Here are standard instructions for learning about and getting these items:

Getting a CMS HN account

You will need a CMS HyperNews account, this can only be obtained once you have a working CERN computer account by following these instructions here. Please note that when you do the ssh hypernews.cern.ch step, you have to use your CMS related CERN account (the one in "zh") and your normal CERN password. Then follow the instructions as given.

Getting a Local Account at your Institution

You may also have access to computing resources at your local institution. You should ask your local computing experts and colleagues about the use of these resources for CMS-related work. See WorkBookRemoteSiteSpecifics, to see if your institution has provided information.

FermiLab Special for Fermilab

Access to AFS and CMS Software

The WorkBook instructions generally assume you're running CMS software on the CERN Public Login Linux system LXPLUS. This environment ensures that you will have direct access to the AFS file system, which holds the CMS software Releases. Additionally, all the tools you'll need to develop your software are installed and set up on LXPLUS , so you can start work almost immediately. Local systems may have different unix shells and different setups, it is impossible to provide fool-proof instructions for all environments. Again, see WorkBookRemoteSiteSpecifics, to see if your institution has provided information. If you are not familiar with using Linux, see this list of basic Linux Commands.

Access to the Grid

See Starting on the GRID, Grid Basics.

Review status

Reviewer/Editor and Date (copy from screen) Comments
SudhirMalik - 09-Sep-2017 Responsible
MargueriteTonjes - 01-Sep-2017 Responsible

This is an example how to add you detailed comments. Use the usual twiki syntax (see Edit help in the twiki edit mode).

The information is relevant and clear (only one sugestion to add a sentence), some links require little work. Antonio Morelos 120424

I would suggest to change the link " Users.Office@cernSPAMNOTNOSPAMPLEASE.ch " to something like: " Users.Office@cernSPAMNOTNOSPAMPLEASE.ch (remove SPAMNOT) "

I would suggest to change the tel. number " +41227678888 " to something like: " +41227677777 " As shown in page http://information-technology.web.cern.ch/help.

I would suggest to change the link " cms.people@cernSPAMNOTNOSPAMPLEASE.ch " to something like: " cms.people@cernSPAMNOTNOSPAMPLEASE.ch (remove SPAMNOT) "

I would suggest to change the address " it.servicedesk@cernNOSPAMPLEASE.ch " to something like: " service-desk@cernNOSPAMPLEASE.ch " As shown in page http://information-technology.web.cern.ch/help

I would suggest to change the address " ais.support@cernSPAMNOTNOSPAMPLEASE.ch " to something like: " ais.support@cernSPAMNOTNOSPAMPLEASE.ch (remove SPAMNOT) "

In the subsection "Adminstrative Information Services (ais, edh) I would suggest to include the following text: " There are several courses. The lowest safety level course and computer related course are required to perform activities on CERN site(s) and access CERN Computing system. As part of the CERN registration you will be asked to go through those courses. "

I would suggest to update the link at " Use of CERN Computing Facilities ", presently points to " http://computingrules.web.cern.ch/ComputingRules/ " which it redirects itself to: " https://security.web.cern.ch/security/rules/en/index.shtml "

I would suggest to update the link at " CERN Computer Security Information " presently points to " http://security.web.cern.ch/security/ " which it redirects itself to: " https://security.web.cern.ch/security/home/en/index.shtml "

I would suggest to update the link at " If You Need Help (IT service) " presently points to " http://it-div.web.cern.ch/it-div/need-help/ " this page does not exist, instead the automatic search is sent to: " http://information-technology.web.cern.ch/need-help/ "

Inserted the suggested comments and checked them , Antonio Morelos 120425

Make it clear CERN account is now mandatory, refer to SSO, add HN acount, rename Grid Certficate to Access to Grid , Stefano Belforte 121114

Responsible: CMSUserSupport
Last reviewed by: Main.Sudhir Malik - 9 Sep 2017

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Topic revision: r49 - 2019-09-20 - StephanLammel



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