July 2017
Beginner
208 pages
3h 7m
English
Content preview from Linux Shell Scripting BootcampBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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File checksums
You probably noticed the use of the sum command above. It displays the checksum and block count of files which can be used to determine if two or more files are the same file (that is, have the exact same contents).
Here is a real world example:
Suppose you are writing a book, and the files are being sent from the author to the publisher for review. The publisher makes some revisions and then sends the revised file back to the author. It is sometimes easy to get out of sync, and receive a file that doesn't look any different. If you run the sum command against the two files you can easily determine if they are the same.
Take a look at the following screenshot:
The first column is the checksum and the second column is the block count. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.