The information here is applicable to LSU HPC and LONI systems.
h4
Shells
A user may choose between using /bin/bash
and /bin/tcsh. Details about each shell follows.
/bin/bash
System resource file: /etc/profile
When one access the shell, the following user files are read in if
they exist (in order):
- ~/.bash_profile (anything sent to STDOUT or STDERR
will cause things like rsync to break)
- ~/.bashrc (interactive login only)
- ~/.profile
When a user logs out of an interactive session, the
file ~/.bash_logout is executed if it exists.
The default value of the environmental variable, PATH, is
set automatically using Modules. See below for more
information.
/bin/tcsh
The file ~/.cshrc is used to customize the user's
environment if his login shell is /bin/tcsh.
Modules
Modules is a utility which helps users manage the complex business
of setting up their shell environment in the face of potentially
conflicting application versions and libraries.
Default Setup
When a user logs in, the system looks for a file named .modules
in their home directory. This file contains module commands to
set up the initial shell environment.
Viewing Available Modules
The command
$ module avail
displays a list of all the modules available. The list will look
something like:
--- some stuff deleted ---
velvet/1.2.10/INTEL-14.0.2
vmatch/2.2.2
---------------- /usr/local/packages/Modules/modulefiles/admin -----------------
EasyBuild/1.11.1 GCC/4.9.0 INTEL-140-MPICH/3.1.1
EasyBuild/1.13.0 INTEL/14.0.2 INTEL-140-MVAPICH2/2.0
--- some stuff deleted ---
The module names take the form appname/version/compiler,
providing the application name, the version, and information about how
it was compiled (if needed).
Managing Modules
Besides avail, there are other basic module commands to use for
manipulating the environment. These include:
add/load mod1 mod2 ... modn . . . Add modules
rm/unload mod1 mod2 ... modn . . Remove modules
switch/swap mod . . . . . . . . . Switch or swap one module for another
display/show . . . . . . . . . . List modules loaded in the environment
avail . . . . . . . . . . . . . . List available module names
whatis mod1 mod2 ... modn . . . . Describe listed modules
The -h option to module will list all available commands.
