Difference between revisions of "Introduction to Linux in HPC/Linux Directory Structure"

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Introduction to Linux in HPC/Linux Directory Structure
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=== Exercises in Terminal (slide 49)=== <!--T:5-->  
 
=== Exercises in Terminal (slide 49)=== <!--T:5-->  
  
  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.
+
  1. Go to a specific subfolder of a folder (example: <code>cd Documents/courses/</code> ) and get back to the home directory using <code>cd</code> command. List 3 different ways to do it using one command. check after every action your path with <code>pwd</code> command.
 
   {| role="presentation" class="wikitable mw-collapsible mw-collapsed"
 
   {| role="presentation" class="wikitable mw-collapsible mw-collapsed"
 
     | <strong>Answer:</strong>
 
     | <strong>Answer:</strong>
 
     |-
 
     |-
 
     |  
 
     |  
        cd
+
      <code>cd</code>
        cd ~
+
      <code>cd ~</code>
        cd $HOME
+
      <code>cd $HOME</code>
 
         the last option $HOME is an enviornment variable. You will learn about enviornment variables later.
 
         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.
+
  2. Go to the directory <code>/tmp</code> and jump between <code>/tmp</code> and your home directory back and forth. check after every action your path with <code>pwd</code> command.
   {| role="presentation" class="wikitable mw-collapsible mw-collapsed"
+
   {| role="presentation" class="wikitable mw-collapsible mw-collapsed"</code>
 
     | <strong>Answer:</strong>
 
     | <strong>Answer:</strong>
 
     |-
 
     |-
 
     |  
 
     |  
         cd /tmp
+
         <code>cd /tmp</code>
         cd -
+
         <code>cd -</code>
         cd - with cd - you change back to the previous working directory, pass the dash (-) character as an argument to the cd command.
+
         <code>cd -</code> with <code>cd -</code> you change back to the previous working directory, pass the dash <code>-</code> character as an argument to the <code>cd</code> command.
 
     |}
 
     |}

Revision as of 10:29, 2 October 2020

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

1. Which one is the top directory in Linux?

/
/home
C:\


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.
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.