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Mastering Linux Shell Scripting

You're reading from   Mastering Linux Shell Scripting Master the complexities of Bash shell scripting and unlock the power of shell for your enterprise

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784396978
Length 198 pages
Edition 1st Edition
Tools
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Author (1):
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Andrew Mallett Andrew Mallett
Author Profile Icon Andrew Mallett
Andrew Mallett
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Toc

Table of Contents (16) Chapters Close

Preface 1. What and Why of Scripting with Bash FREE CHAPTER 2. Creating Interactive Scripts 3. Conditions Attached 4. Creating Code Snippets 5. Alternative Syntax 6. Iterating with Loops 7. Creating Building Blocks with Functions 8. Introducing sed 9. Automating Apache Virtual Hosts 10. Awk Fundamentals 11. Summarizing Logs with Awk 12. A Better lastlog with Awk 13. Using Perl as a Bash Scripting Alternative 14. Using Python as a Bash Scripting Alternative Index

Displaying the browser data

The browser that is used to access the web site is contained within the log file in field 12. It may be interesting to display the list of browsers used to access your site. The following code will assist you in displaying the list of accesses by the reported browser:

{ browser[$12]++ }
END {
    for ( b in browser )
        print b, " has accessed ", browser[b], " times."
    }

You can see how we can create little plugins to awk with these files and adjust the field and array names to suit your own liking. The output is shown in the following screenshot:

Displaying the browser data

Interestingly, we see that the Mozilla 4 and 5 make up the majority of the requesting client. We see that Mozilla 4 is listed here 1713 times. The Mozilla/5.0 entry here is malformed with an extra double-quote. It appears later with 27K accesses.

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