Introduction to Linux in HPC/Users and permissions

From HPC Wiki
Introduction to Linux in HPC/Users and permissions /
Revision as of 22:14, 26 November 2020 by Christian-siebert-cbc6@uni-duesseldorf.de (talk | contribs) (added a short abstract)
Jump to navigation Jump to search

Tutorial
Title: Introduction to Linux in HPC
Provider: HPC.NRW

Contact: tutorials@hpc.nrw
Type: Multi-part video
Topic Area: HPC Platforms
License: CC-BY-SA
Syllabus

1. Background and History
2. The Command Line
3. Linux 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

This tutorial covers the concept of users (and groups) in the multi-user operating system Linux. It will also explain the various permissions that a file or directory can have, how to determine and change them.

Video

( Slides as pdf)

Quiz

Which command can prevent other users not in your group from writing to input.dat?

chmod u-w input.dat
chmod o-w input.dat
chmod g-w input.dat


Exercises in Terminal (slide 89)

1. Create an empty file, make it read-only, make it executable.
2. Start a process (e.g. sleep 10m)
3. Start a process, bring it into background/foreground.


<< Text Display and Search

Overview

Processes >>