Connecting to the cluster

Connect to the cluster

From a Linux machine (Mac will need -Y option as well):

If you are using a Mac, you will have to install XQuartz first. You can download it from here https://www.xquartz.org

ssh -X -Y username@hepcms-rubin.umd.edu

Make sure you log out after installing XQuartz

From a Windows machine:

On Windows, you may also find following useful.  It provides you LINUX-like terminal  on Windows.

https://docs.microsoft.com/en-us/windows/wsl/install

Or one can following instructions below.

PuTTY (Terpware link) provides an ssh client for Windows machines. Configuring PuTTY after installation varies a bit from version to version, but the most important setting is the host name: hepcms.umd.edu. You will also want to turn X11 forwarding on, typically under Connection->SSH->Tunnels, and you may want to set your username, typically under Connection. Your settings can be saved for future sessions. Note that the CMS Workbook SSH & setting up X11 twiki has some information about PuTTY, as well as Secure Shell, a different client (which has SSH and SFTP).

Newer verisons of PuTTY should have Kerberos authentication, which can be used for connecting to FNAL. You'll also need a Windows Kerberos client. Instructions to install and configure it can be found at the FNAL website. If you use this PuTTY client, be sure to turn off Kerberos authentication for your connection to hepcms, typically under Connection->SSH->Auth, listed as GSSAPI auth.

XMING is a X Server for Windows and does support PuTTY. It comes with some versions of PuTTY. It is needed for any software running at hepcms which pops up windows on your machine, such as root. If you plan to run emacs, installing the additional Xming font executable is strongly recommended. If you plan to use Fireworks or other sophisticated graphics software, installing Xming-Mesa is required. Other X-servers are listed in the CMS Workbook SSH & setting up X11 twiki.

If you are getting errors when trying to open emacs or root display "display not set ........" - it means you dont have Xming running and X11 forwrd checked in putty setting.

Get Kerberos tickets for FNAL & CERN

Two aliased commands have been set up in each new user's .cshrc/.bashrc files, automatically sourced on login. Execute either command below, with the appropriate username for FNAL or for CERN (not necessarily the same as your HEPCMS username).

• kinit_fnal username@FNAL.GOV

• kinit_cern username@CERN.CH

Troubleshooting your connection

• Troubleshooting your connection