Tutorial11: Sed & Awk Utilities

USING SED & AWK UTILTIES

Main Objectives of this Practice Tutorial

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• x

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Tutorial Reference Material

Course Notes		Linux Command/Shortcut Reference		YouTube Videos
Course Notes: PDF | PPTX		Text Manipulation Purpose of using sed utility Purpose of using awk utility	Man Pages sed awk	Brauer Instructional Videos: Using the sed Utility Using the awk Utility

KEY CONCEPTS

Manipulating Text

x

Using the sed Utility

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Using the awk Utility

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INVESTIGATION 1: USING THE SED UTILITY

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   
   

In the next investigation, you will ...

INVESTIGATION 2: USING THE AWK UTILITY

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   
   

In the next investigation, you will ...

INVESTIGATION 3: USING SED & AWK UTILITIES AS FILTERS

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   

LINUX PRACTICE QUESTIONS

The purpose of this section is to obtain extra practice to help with quizzes, your midterm, and your final exam.

Here is a link to the MS Word Document of ALL of the questions displayed below but with extra room to answer on the document to simulate a quiz:

https://ict.senecacollege.ca/~murray.saul/uli101/uli101_week11_practice.docx

Your instructor may take-up these questions during class. It is up to the student to attend classes in order to obtain the answers to the following questions. Your instructor will NOT provide these answers in any other form (eg. e-mail, etc).

Review Questions:

Part A: Display Results from Using the sed Utility

Note the contents from the following tab-delimited file called ~murray.saul/uli101/stuff.txt: (this file pathname exists for checking your work)

Line one.
This is the second line.
This is the third.
This is line four.
Five.
Line six follows
Followed by 7
Now line 8
and line nine
Finally, line 10

Write the results of each of the following Linux commands for the above-mentioned file:

1. sed -n '3,6 p' ~murray.saul/uli101/stuff.txt
   
   
2. sed '4 q' ~murray.saul/uli101/stuff.txt
   
   
3. sed '/the/ d' ~murray.saul/uli101/stuff.txt
   
   
4. sed 's/line/NUMBER/g' ~murray.saul/uli101/stuff.txt

Part B: Writing Linux Commands Using the sed Utility

Write a single Linux command to perform the specified tasks for each of the following questions.

1. Write a Linux sed command to display only lines 5 to 9 for the file: ~murray.saul/uli101/stuff.txt
   
   
2. Write a Linux sed command to display only lines the begin the pattern “and” for the file: ~murray.saul/uli101/stuff.txt
   
   
3. Write a Linux sed command to display only lines that end with a digit for the file: ~murray.saul/uli101/stuff.txt
   
   
4. Write a Linux sed command to save lines that match the pattern “line” (upper or lowercase) for the file: ~murray.saul/uli101/stuff.txt and save results (overwriting previous contents) to: ~/results.txt
   
   

Part C: Writing Linux Commands Using the awk Utility

Note the contents from the following tab-delimited file called ~murray.saul/uli101/stuff.txt: (this file pathname exists for checking your work)

Line one.
This is the second line.
This is the third.
This is line four.
Five.
Line six follows
Followed by 7
Now line 8
and line nine
Finally, line 10

Write the results of each of the following Linux commands for the above-mentioned file:

1. awk ‘NR == 3 {print}’ ~murray.saul/uli101/stuff.txt
   
   
2. awk ‘NR >= 2 && NR <= 5 {print}’ ~murray.saul/uli101/stuff.txt
   
   
3. awk ‘$1 ~ /This/ {print $2}’ ~murray.saul/uli101/stuff.txt
   
   
4. awk ‘$1 ~ /This/ {print $3,$2}’ ~murray.saul/uli101/stuff.txt
   
   

Part D: Writing Linux Commands Using the awk Utility

Write a single Linux command to perform the specified tasks for each of the following questions.

1. Write a Linux awk command to display all records for the file: ~/cars whose fifth field is greater than 10000.
   
   
2. Write a Linux awk command to display the first and fourth fields for the file: ~/cars whose fifth field begins with a number.
   
   
3. Write a Linux awk command to display the second and third fields for the file: ~/cars for records that match the pattern “chevy”.
   
   
4. Write a Linux awk command to display the first and second fields for all the records contained in the file: ~/cars