Difference between revisions of "Introduction to Linux in HPC/The vim text editor"

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Introduction to Linux in HPC/The vim text editor
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This part of the Linux tutorials introduces the vim text editor and describes its main features and use cases. A short explanation of the most important commands paired with examples on how to use them allow the user to delve right in. The tutorial demonstrates the basics, like opening/writing files or moving within the text as well as the most often employed tasks like search&replace or copy&paste which makes it interesting both to a complete beginner and more intermediate user. The vim text editor's main advantage is that it's present in most unix operational systems, futhermore it's highly configurable and provides an extensive plugin system.
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This part of the Linux tutorials introduces the vim text editor and describes its main features and use cases. A short explanation of the most important commands paired with examples on how to use them allow the user to delve right in. The tutorial demonstrates the basics, like opening/writing files or moving within the text as well as the most often employed tasks like search&replace or copy&paste which makes it interesting to both complete beginners and more intermediate users. The vim text editor's main advantage is that it's present in most unix operational systems, futhermore it's highly configurable and provides an extensive plugin system.
  
 
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{{hidden begin
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|title = How many modes does vim have?
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}}
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<quiz display=simple>
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{
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|type="()"}
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-  it has only one mode
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|| 
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-  it has two modes
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+  it has at least three modes
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|| Explanation: <code>vi</code> has the modes normal, insert and command. In addition, <code>vim</code> hast the modes visual, select und ex-mode, not covered in this tutorial.
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</quiz>
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{{hidden end}}
  
 
{{hidden begin  
 
{{hidden begin  
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|title = 1. How to enter the insert mode of <code>vim</code>?
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|title = How to enter the insert mode of <code>vim</code>?
 
}}
 
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<quiz display=simple>
 
<quiz display=simple>
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|| Explanation: If you are not in the insert mode, the <code>i</code> key means insert and by pressing it you can enter the insert mode. On the other hand, the <code>Esc</code> key brings you out of the insert mode. The behavior of the enter key depends on in which mode of vim you are. If you are in the normal mode, you navigate to the next line. If you are in the insert mode already, you start a new line.
 
|| Explanation: If you are not in the insert mode, the <code>i</code> key means insert and by pressing it you can enter the insert mode. On the other hand, the <code>Esc</code> key brings you out of the insert mode. The behavior of the enter key depends on in which mode of vim you are. If you are in the normal mode, you navigate to the next line. If you are in the insert mode already, you start a new line.
 
- press <code>Esc</code> key
 
- press <code>Esc</code> key
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</quiz>
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{{hidden end}}
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{{hidden begin
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|title = How to save a file and exit during normal mode?
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}}
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<quiz display=simple>
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{
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|type="()"}
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- press <code>:q!</code> keys
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+ press <code>:wq</code> or <code>:X</code> or <code>ZZ</code> keys
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|| Explanation: Any of the pressed key combinations will trigger a save and exit when in normal mode.
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- press <code>Ctrl-x Ctrl-s</code> key
 
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</quiz>
 
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{{hidden begin  
 
{{hidden begin  
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|title = 2. How would you open a file in read-only mode using the <code>vim</code> editor? </br>
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|title = How would you open a file in read-only mode using the <code>vim</code> editor? </br>
 
Hint: In terminal <code>man vim</code>  
 
Hint: In terminal <code>man vim</code>  
 
}}
 
}}

Revision as of 19:53, 25 November 2020

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 part of the Linux tutorials introduces the vim text editor and describes its main features and use cases. A short explanation of the most important commands paired with examples on how to use them allow the user to delve right in. The tutorial demonstrates the basics, like opening/writing files or moving within the text as well as the most often employed tasks like search&replace or copy&paste which makes it interesting to both complete beginners and more intermediate users. The vim text editor's main advantage is that it's present in most unix operational systems, futhermore it's highly configurable and provides an extensive plugin system.

Video

( Slides as pdf)

Quiz

How many modes does vim have?

it has only one mode
it has two modes
it has at least three modes

How to enter the insert mode of vim?

press enter key
press i key
press Esc key

How to save a file and exit during normal mode?

press :q! keys
press :wq or :X or ZZ keys
press Ctrl-x Ctrl-s key


How would you open a file in read-only mode using the vim editor?
Hint: In terminal man vim

Click and submit to see the answer


Info:  If you forget in which mode you are in while using vim, just keep pressing Esc.


Exercises in Terminal (slide 100)

1.  Create a vim file and write some text in it with insert (pressing i) and than undo and redo the changes.



<< Processes

Overview

Shell Scripting >>

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