Computer Accounts

All persons using SLAC computers or accounts are responsible for understanding and complying with the SLAC cyber security requirements.

Create or Use LCLS UNIX Computer Accounts, Set Up & Access Electronic Logbook (eLog)

Obtaining LCLS Unix computer account and accessing LCLS experiment elogs to participate in proposal data collection and analysis is a multi-step process:

  1. The proposal spokesperson or their designee must identify collaborators who need a SLAC UNIX account when they submit their beam time support request (BTSR) through User Portal.
    (After the BTSR has been submitted, if changes are needed, then the spokesperson should directly contact
  2. LCLS users who create or use UNIX accounts must:
    1. be registered in the User Portal

    2. have a valid User Agreement

    3. have a System ID # in the SLAC Directory , and be listed as Active

    4. complete Course CS100 - Cyber Security for Laboratory Users Training 
      (note: if you have a new computer account and have not completed this course, then you only have a 5-day grace period to complete this course before your account is disabled)
      • Go to the Web Training page on the SLAC Training Portal website.
      • Click on the red "Manual Login" box to access the log-in page where you will enter your SLAC System ID # (found by searching for your name in the SLAC Phone Directory), and the password slac2005.
      • After log-in, select "Web Training Catalog".
      • Click on "Users" and then select 'Course CS100 - Cyber Security for Laboratory Users Training', click on 'Launch' to begin the course.
      • Please verify your training was recorded by clicking 'My Progress' to the left of the SLAC Training Portal home page.
      • Once you have completed the courses, save a screenshot of your certificates of completion in case there is a computer glitch (it may take 2 hours for credit for completed courses to be downloaded into the SLAC training database).

        (For more information, see Troubleshooting section: Expired Course CS100 if you have an existing UNIX account)
  3. The LCLS users then log into the User Portal (See images below)
    1. Click the link  'LCLS Unix Account: none (more info)' from the Welcome page 
      computer account

    2. Click on the button 'Request LCLS Unix Account', and follow the instructions including reading and agreeing to the 'Use of SLAC Information Resources' agreement.
      (If you do not see this button, and you have just finished your Course CS100, then please wait a couple of hours and try again after the training data has synched.
      The username you choose should be 1 word, with no space.)
      computer account

    3. Within 5 minutes, your temporary password should be e-mailed to you, please follow the instructions to set your password
    4. If you have any problems, please e-mail

  4. When your UNIX account is created, it will be given permission to the experiment in Experiment Portal/eLog.
    (Permission in Experiment Portal/eLog is usually set up about a month before the experiment start date, using the UNIX accounts of the list of collaborators from the BTSR.  If you need access to the experiment earlier than that - or if you need access to a past experiment, please send e-mail to


Confirm Existing LCLS UNIX Computer Accounts

If you already have a Unix Account, then when you login to the  User Portal , the Welcome page will list whether the following conditions have been met for continued use of the account:

  • your account name, and the date that the password is valid till (password expires every 6 months)
  • whether the User Agreement is valid
  • whether Course CS100 is valid.

    If any of the above conditions needs to be fulfilled or for other problems with existing Unix accounts, please see troubleshooting below.


Tips for Troubleshooting Problems with your Computer Account

  1. Change Unix password (including expired passwords):
  2. Reset password (if you don’t remember your password, e-mail (for off-hour emergencies,
  3. Expired Course CS100 - Cyber Security for Laboratory Users Training (course is valid for 1 year) - when you login to User Portal it will display that the training has expired.  Follow the steps to renew Course CS100, then contact the SLAC IT Help Desk during normal business hours (Monday through Friday, 7 am to 6 pm Pacific,, +1 650.926.4357) to request to have your account re-enabled and a reset password be sent to you.  (note:  this process may take several days).
  4. Expired User Agreement - when you login to User Portal it will display that the User Agreement has expired.
  5. If you cannot see your experiment but can login to Experimental Portal Experiment Portal/eLog, contact