Introduction to Linux in HPC/Linux Directory Structure

Video

Linux Introduction Slides 33 - 48 (16 pages)

Slide Layout

   page 1: 
       Windows: drive letter + backslash (C:)
       Linux: standard tree directory structure
       Absolute path: starts with /
       Relative path: w.r.t. working directory
   page 2 - 11: 
       Animation for directory structure
       example directories
   page 12: 
       everything is a file: /dev and /proc
       program/script can be found with which
       special directories: ., .. and ~
   page 13: 
       cd command
   page 14: 40 sec
       ls command
   page 15: 
       specific commands: Ctrl+key (C, Z, D), exit and clear
   page 16: 
       no undo
       make sure what you want to do

Quiz

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1. Which one is the top directory in Linux?

	A: /
	B. /home
	C. C:\

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2. The command 'cd ' without arguments : if you start in var/log/ and run cd with no arguments, what do you expect will happen?

	Nothing it stays in /var/log/
	It goes to your home directory
	It goes to the filesystem root
	The shell stops having a working directory
	It’s an error
	The shell prompt turns into a shark and eats you

Info:

no tips in this section

Warning:

no undo and make sure what you want to do (page 16)

Exercises in Terminal (slide 49)

1. Go to a specific subfolder of a folder (example: cd Documents/courses/ ) and get back to the home directory using cd command. List 3 different ways to do it using one command. check after every action your path with pwd command.

ExpandAnswer:

       cd
       cd ~
       cd $HOME
       the last option $HOME is an enviornment variable. You will learn about enviornment variables later.

2. Go to the directory /tmp and jump between /tmp and your home directory back and forth. check after every action your path with pwd command.

ExpandAnswer:

       cd /tmp
       cd -
       cd - with cd - you change back to the previous working directory, pass the dash (-) character as an argument to the cd command.