Your Basic Environment

Owned by Simon Alexander, created
Last updated: Aug 21, 2024
5 min read

Goal: Demonstrate what a default session starts as.

Bash

Bash is command-line shell and scripting language that allows users to interact with Unix-based operating systems.

[]$ bash --version GNU bash, version 5.1.8(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software; you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Environment Variables

An environment variable is a user/system defined value that can read by users/scripts/applications, and be used to affect/influence how something can/should behave.

Lets list everything that the session is currently aware of - there’s a lot!

This demonstrates that there is a lot of things being defined and configured, behind the scenes, to make your session run as required.

[]$ env
[]$ echo $PATH # Something of the form: /home/<username>/.local/bin:/home/<username>/bin:/apps/s/arcc/1.0/bin:/apps/s/slurm/latest/bin:/usr/share/Modules/bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin

Keep an Eye on the Message of the Day

Forgot Which Projects You’re In? What’s My Storage Use?

Help and Manual Pages

Are There Compilers and Languages Available?

Let's run a Python script:

Let's run a Python script: Fixed:

Let’s Run an R Script

You Can’t Break the System

What is sudo? Can I use/request sudo?

 

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Intro to using the Module System

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The Module System and What’s Available