Difference between revisions of "Introduction to Linux in HPC/Environment variables"

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Revision as of 13:25, 17 November 2020


HPC.NRW
HPC.NRW
Other HPC Courses
1. Gprof Tutorial
2. OpenMP in Small Bites
Introduction to Linux in HPC
1. Background and History
2. The Command Line
3. Directory structure
4. Files
5. Text display and search
6. Users and permissions
7. Processes
8. The vim text editor
9. Shell scripting
10. Environment variables
11. System configuration
12. SSH Connections
13. SSH: Graphics and File Transfer
14. Various tips



Video

( Slides as pdf)

Quiz

Which bash command below assigns "value" to variable var?

var="value"
var = "value"
var=="value"

Exercises in Terminal

1. a. Write a script that
   b. Prints an environment variable
   c. Saves the output of the date command to a variable
   d. Sleeps briefly
   e. Prints the new and old date and time
 2. What do different types of quotes (single ' vs. double ") do?
3. create an shell variable MYIDENTITY and export it as below: 
   $ export MYIDENTITY=whoami
   How will you list the shell variable MYIDENTITY?
   Execute the shell variable MYIDENTITY, what is the output? 



<< Shell Scripts

Overview

System Configuration Files >>