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37
votes
5answers
23k views

What is a Superblock, Inode, Dentry and a File?

From the article Anatomy of Linux File Systems by Tim Jones, I read that Linux views all the file systems from the perspective of a common set of objects and these objects are superblock, inode, ...
18
votes
1answer
15k views

How can I increase the number of inodes in an ext4 filesystem?

I had a problem (new to me) last week. I have a ext4 (Fedora 15) filesystem. The application that runs on the server suddenly stopped. I couldn't find the problem at first look. df showed 50% ...
4
votes
6answers
1k views

Portable way to find inode number

At first I used stat -c %i file (to help detect the presence of a jail), which seemed to work on any Linux distribution under the sun. On OS X' I had to use ls -i file | cut -d ' ' -f 1. Is there ...
26
votes
2answers
1k views

Why does a software package run just fine even when it is being upgraded?

Say I am running a software, and then I run package manager to upgrade the software, I notice that Linux does not bring down the running process for package upgrade - it is still running fine. How ...
7
votes
6answers
20k views

How do I count all the files recursively through directories

I want to see how many files are in subdirectories in there subdirectories to find out where all the inode usage is on the system. Kind of like I would do this for space usage du -sh /* which will ...
10
votes
2answers
3k views

Is it possible to change Inode count on an ext4 filesystem? [duplicate]

Possible Duplicate: How can I increase the number of inodes in an ext4 filesystem? I have a homemade NAS with Debian Wheezy 64bit. It has three disks - 2x2TB and 1.5TB, pooled together ...
8
votes
2answers
1k views

why inode value changes when we edit in “vi” editor?

When I edit a file in "vi" editor the inode value of the file is changing. But when edited with cat command the inode value is not changing.
8
votes
4answers
274 views

Find where inodes are being used

So I received a warning from our monitoring system on one of our boxes that the number of free inodes on a filesystem was getting low. df -i output shows this: Filesystem Inodes IUsed ...
5
votes
2answers
212 views

How do I find the inode of any directory?

There is literally nothing on google that I can find that will help me answer this question. I presume it is passing some other parameter to ls -i?
5
votes
2answers
104 views

Difference between xattr and chattr

What is the relation and the difference between xattr and chattr? I want to know when I set a chattr attribute in Linux what is happening inside the Linux kernel and inode metadata.