HPC/FAQ

"I cannot log in"

1. Make sure you connect to the correct host names, namely mega.cnm.anl.gov for the SSH gateway and clogin.cnm.anl.gov when onsite. Do not use "carbon".
   • Access to mega requires an active proposal. Access will be disabled 6 weeks after your last active proposal expired. To identify such times, scan your email archive for mails containing the words "Work Approval Received" in the subject.
   • Users who are non-US citizens require a current visa for access. On expiration, your Argonne login will be disabled, possibly in the mddle of a proposal lifetime, and you may suddenly find you can no longer access mega. Review and renew your details at https://beam.aps.anl.gov/pls/apsweb/ufr_main_pkg.usr_start_page .
2. Visit https://credentials.anl.gov/ and verify that your username and password are correct.
3. To have your password reset, email the CNM User Office, at [email protected].
4. It may take about 1–3 hours for a proposal to be recognized as active again on mega.
5. Carefully re-read HPC/Network Access, and follow the instructions for your platform.

"I'd like to use program X"

Check if the application is already available on Carbon

Either:

• Browse the Application Catalog, or
• View the catalog on the Carbon command line:

module avail
module -l avail 2>&1 | less

The second form gives you browsable output.

If you cannot find the application

1. Describe the problem you are trying to solve – it may well be that we can suggest an alternative solution.
2. Provide one or more URLs relevant to the software – be specific.

To report a problem

Send mail to [email protected]

Consider the following advice:

• How To Ask Questions The Smart Way, by Eric S. Raymond, open source pioneer.
• How to Report Bugs Effectively, by Simon Tatham, programmer.

Report network and connectivity issues

Include the following:

1. Your operating system and version.
2. The software name and version you use to connect (e.g. SSH or VNC).
3. The command you are trying to run or the menu item you choose.
4. The hostname you're trying to reach and the username.
5. The error message you get (Copy & Paste the message text, or take a screenshot)