Change Your Default Password

The first time you log onto the ACCRE cluster, you should change the password that was assigned to you when your account was set up.

Please follow these steps:

1. After receiving your ACCRE username and initial password, log onto the cluster (vmplogin.accre.vanderbilt.edu) via an SSH client.

At this point, you are simply logged onto the cluster gateway. Any changes to your account will need to be propogated to all of the compute nodes.

2. Issue the command:

   ssh vmpsched

   Commands issued now (e.g., the passwd command below) will effect modifications to all of the nodes.

3. To change your password, type the command:

   passwd

   The passwd program prompts you to enter a new password. Please use a non-dictionary word (i.e., nonstandard words, combinations of letters and numbers). After you have changed your password, please allow approximately one hour for the change to be propogated to all of the nodes.

4. To disconnect from vmpsched, type:

   exit

   You will still be logged into your account. You may either continue working on the cluster or log out.

Your password change will be propagated out to all of the nodes within approximately one hour.

Your Default Environmental Settings

To view your default environmental settings:

• Type:

  set

Changing Your Shell

Your "shell" is essentially your working environment while you are logged onto the cluster. Virtually any of the newer shells add such functionality as command/filename completion (e.g., spell part of the command, hit a "hot key," and the shell will try to complete the name of the command/file), command line editor (so you can edit and re-invoke previously executed commands), manipulation of history on the system, and definition of command aliases/functions.

Currently the default user shell is set as bash.

To change your default shell:

1. Issue the command:

   ssh vmpsched

   Commands issued now (e.g., the passwd command) will effect modifications to all of the nodes.

2. Type:

   chsh

3. You will be prompted for your choice of shells. Enter

   /bin/bash

   for the bash shell or

   /bin/tcsh

   for C-shell.

4. To disconnect from vmpsched, type:

   exit

   You will still be logged into your account. You may either continue working on the cluster or log out.

Your shell change will be propagated out to all of the nodes within approximately one hour.

Adding Your Default Compiler and Libraries

There are no compiler and library paths set up for you automatically. The set command will allow you to see the directories currently in your path. The setpkgs command allows you to add compilers and libraries to your path.

• To view various options available on the setpkgs command and the locations of the compilers and libraries on the cluster, simply type:

  setpkgs

• To add a compiler or library to your path, add the respective setpkgs command to your .bashrc or .cshrc file. For example, to add the GCC and ABSOFT packages for the Pentium 4:

  1. Edit your .cshrc or .bashrc file.

  2. Add the following line:

     setpkgs -r gcc_p4_pkgs

Please continue to submitting basic jobs.