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Linux Shell Scripting Cookbook

You're reading from   Linux Shell Scripting Cookbook Do amazing things with the shell and automate tedious tasks

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Product type Paperback
Published in May 2017
Publisher
ISBN-13 9781785881985
Length 552 pages
Edition 3rd Edition
Tools
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Authors (3):
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Clif Flynt Clif Flynt
Author Profile Icon Clif Flynt
Clif Flynt
Sarath Lakshman Sarath Lakshman
Author Profile Icon Sarath Lakshman
Sarath Lakshman
Shantanu Tushar Shantanu Tushar
Author Profile Icon Shantanu Tushar
Shantanu Tushar
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Toc

Table of Contents (14) Chapters Close

Preface 1. Shell Something Out FREE CHAPTER 2. Have a Good Command 3. File In, File Out 4. Texting and Driving 5. Tangled Web? Not At All! 6. Repository Management 7. The Backup Plan 8. The Old-Boy Network 9. Put On the Monitors Cap 10. Administration Calls 11. Tracing the Clues 12. Tuning a Linux System 13. Containers, Virtual Machines, and the Cloud

Sorting unique and duplicate lines

Sorting text files is a common task. The sort command sorts text files and stdin. It can be coupled with other commands to produce the required output. uniq is often used with sort to extract unique (or duplicate) lines. The following recipes illustrate some sort and uniq use cases.

Getting ready

The sort and uniq commands accept input as filenames or from stdin (standard input) and output the result by writing to stdout.

How to do it...

  1. We can sort a set of files (for example, file1.txt and file2.txt), like this:
        $ sort file1.txt file2.txt > sorted.txt

 Alternatively...

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