Your Basic Environment
- Simon Alexander
Owned by Simon Alexander, created
Goal: Demonstrate what a default session starts as.
- 1 Bash
- 2 Environment Variables
- 3 Keep an Eye on the Message of the Day
- 4 Forgot Which Projects You’re In? What’s My Storage Use?
- 5 Help and Manual Pages
- 6 Are There Compilers and Languages Available?
- 7 Let's run a Python script:
- 8 Let’s Run an R Script
- 9 You Can’t Break the System
- 10 What is sudo? Can I use/request sudo?
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/sbinKeep 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?