Some years ago I read a quote by Abraham Lincoln about How a government must be. He said

Government of the people, by the people, for the people, shall not perish from the Earth.

Actually I first read it years ago in University when Studing about Unix in a book. But unfortunaltly I can't remember book name.

But fortunate enouth someone in an article write about in Persian here.

gnu planet

So in there express source of quote is Book ABC of SCO Unix.

Text in Persian

After I find book name, the next step is to get book.

So how to find ebook version.

General search engine like duckduckgo not provide result. Consulting libgen.is without success.

Next try is Intenet archive project

OK, find it in internet archive. But in there we can only review and borrow.

By Installing firefox extention Internet Archive Downloader we can grab pdf file.

$ ls -ltrh
-rw-r--r-- 1 esmaeel esmaeel 175M Feb 28 01:05  abc.pdf

To doing search we need convert each book page to plain text

In Debian we have tesseract program for this task.

Install tesseract

$ sudo apt install tesseract

Convert picture to text

tesseract eng.png out.txt

It is simple, just run it with bash

bash run.sh

After works finished we have a good book to read.

Search for word in all files with grep

I want to search for "lincoln" word in all of book.

grep -ri "lincoln" out/text -A20 -B 20 -h > ~/lincoln.txt

Explaination

grep for lincoln word in all files inside the out/text directory. doing search in case intensive form i and recursivly r.

Show only 20 lines before and after -A20 -B20

And remove file name from output -h

find_speech_in_book

Lincoln said government should be “of the people, by the peo- ple, for the people.” Thompson and Ritchie designed UNIX to be “of the files, by the files, for the files.”

use grep -l

$ grep -ri "lincoln" . -l
./087.txt

This quote appeard in this file 087.txt

After all Initial question is answered well.

And I want to share it with my friends but pdf file is very huge.

$ ls -ltrh
-rw-r--r-- 1 esmaeel esmaeel 175M Feb 28 01:05  abc.pdf

Extract all images from pdf

mkdir images
pdfimages -all abc.pdf images/

By reducing each part of pdf, total size will reduce.

Using convert command and set recution factore to 40%

With try of fail method I find 30% factor is good enough for this ebook.

Append images, create new pdf book.

convert out/*.jpg abc_of_unix.pdf

The_ABC's_of_Sco_Unix