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39
votes
5answers
29k 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, ...
21
votes
1answer
21k 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% ...
5
votes
6answers
2k 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 ...
13
votes
6answers
27k 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 ...
8
votes
2answers
4k views

List all files with the same inode number?

Lets say, when I do ls -li inside a directory, I get this: 12353538 -rw-r--r-- 6 me me 1650 2013-01-10 16:33 fun.txt As the output shows, the file fun.txt has 6 hard links; and the inode number is ...
6
votes
3answers
5k views

Quickly find which file(s) belongs to a specific inode number

I know of this command: find /path/to/mountpoint -inum <inode number> but it is a very slow search, I feel like there has to be a faster way to do this. Does anybody know a faster method?
13
votes
4answers
7k 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 ...
4
votes
2answers
226 views

Linux: How does hard-linking to a directory work?

I'm aware that Linux does not allow hard-linking to a directory. I read somewhere, that this is to prevent unintentional loops (or graphs, instead of the more desirable tree structure) in the ...
10
votes
2answers
5k 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
2k 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.
5
votes
2answers
639 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
326 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.