December 2000
Intermediate to advanced
800 pages
22h 41m
English
Content preview from Special Edition Using Linux®, Sixth EditionBecome 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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Checking Filesystems
The Linux ext2 filesystem is fairly robust. However, if you try hard enough, you can corrupt it. The easiest way to do this is to simply turn the system off without performing a proper shutdown. (Kicking the plug out of the wall accomplishes the same goal if you don't have a UPS.)
Why is this bad? Because Linux, like most UNIX systems, maintains information about files it has accessed in memory (buffers). When these buffers change, they aren't immediately written to disk. These changed buffers are said to be dirty. The system occasionally flushes the buffers to the disk to bring the memory and disk into sync, which is called syncing the disk. You can do this manually by typing sync. Custom dictates doing this several (usually ...
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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.
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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.