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6
votes
1answer
507 views

Finding all the hard-links of a file without traversing the file system

I have seen in this page that inodes have a link counter to know how many files (read: "directory entry") point to this inode. Is there a way to know which directories contain such entries without ...
4
votes
2answers
5k views

Drawbacks of increasing number of inodes in EXT4

I am currently using backintime to take "snapshots" of my file system. It is similar to rsnapshot in that it, makes hard links to unchanged files. I have recently run out of inodes on my EXT4 ...
27
votes
2answers
2k 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 ...
12
votes
2answers
8k 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 ...
0
votes
3answers
463 views

Question about inode and permission command

Can anyone tell me if this is true or false? Does the inode of a file have the addresses of blocks containing the file's content? Also for the permission command, there was a question asking that I ...
1
vote
1answer
920 views

How do I manually modify an inode?

I am using Ubuntu Linux and, just for fun, I want to create a hardlink to a directory (as seen here). Because I'm just doing this for fun, I'm not looking for any sort of pre-developed ...
2
votes
2answers
481 views

how can “several file nodes” be associated with a single inode?

I am trying to learn about iNodes and file permissions. I thought that there is one inode that holds the permissions for a single file. The OS pulls a single inode into memory to check permissions for ...
2
votes
1answer
446 views

Why do inode-based file systems NOT need reboot after updating library versions? [duplicate]

I am trying to understand what an inode is. However, this passage from Wikipedia puzzles me: Installation of new libraries is simple with inode filesystems. A running process can access a library ...
4
votes
2answers
1k views

Storing thousands of files in one directory

I have a web-site that I'm checking for performance issues and bugs, and i came across a caching code that caches thousands of files into one single directory. I understand that this is not good and ...
3
votes
2answers
6k views

How to find inode number using “find” command?

How do you find the inode number of the name of files that start with a particular keyword like "test"? We'll assume that there are files called: test, test1, test2.
3
votes
2answers
1k views

Location of inodes (ext)?

Say I want to observe how the flow from file name to cluster on hard disc goes. I get the inode number of I file (which is mapped in a directory data): 1863 autorun.inf So, now i know that i have ...
0
votes
1answer
442 views

The relationship between execute permission on a directory and its inode structure

My question deals with the relationship between the read and execute bits on a directory. I'm going to give my assumptions, first, all according to my current knowledge, then ask my question in bold ...
4
votes
4answers
726 views

What are inodes good for?

I wonder if storing the information about files in inodes instead of directly in the directory is worth the additional overhead. It may be well that I'm overestimating the overhead or overlooking some ...
10
votes
2answers
6k 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 ...
4
votes
1answer
154 views

ext4 directory lists as a file

I'm working with a large (8TB) EXT4 filesystem in linux. After a power outage, the filesystem wouldn't mount. fsck is taking weeks to complete, but i ran testdisk and i'm able to see my partition ...
3
votes
1answer
2k views

inode limitation on a 500GB hard disk? Can you explain please?

I am launching a social networking website on LAMP Stack on Linux Ubuntu, I know that people are going to upload lots of pictures. Let's say I have 5000 users and each user upload a minimum of 100 ...
9
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.
1
vote
1answer
375 views

Why the inode value of shadow file changes?

I created a hard link for the shadow file. For removing the passwd of the user I opened the shadow file in vi editor and removed the encrypted passwd and then saved. The inode value of the shadow file ...
1
vote
1answer
1k views

what is inode for, in FreeBSD or Solaris

I know a little about linux kernel. BUt for Freebsd, the "vnode" actually is similar to the "inode" in Linux kernel. And there is a "inode" concept in FreeBSD or Solaris. So my question is: what is ...
11
votes
3answers
10k 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?
5
votes
1answer
2k views

On what occasion will inode change?

I checked manual of find , and there's an option -ctime which specify the last modification time of inode. But on what occasion would inode change ? When is that option useful ?
2
votes
0answers
384 views

Odd Inode/Ram cache drops happening in CentOS

I run a CentOS 5.7 machine (64bit) with 24GB ram and 4x SAS drives in RAID10 setup. This machine runs nginx/1.0.10, php-fpm & xcache. About a month back the RAM usage of this machine has changed. ...
23
votes
2answers
31k 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
3k 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 ...
1
vote
2answers
104 views

Is the sticky bit not used in current file systems

Can I safely conclude that the sticky bit is not used in current file sysems and reuse the bit for my own purpose.
17
votes
2answers
7k views

How can I find the number of files on a filesystem?

I want to know how many files I have on my filesystem. I know I can do something like this: find / -type f | wc -l This seems highly inefficient. What I'd really like is to do is find the total ...
3
votes
1answer
158 views

Filesystem and journal layout

Is there any tools or some way in linux which can be used to view internals of filesystems ? How to view the inode related structures and journal ? and cached pages of files (pagecache).
8
votes
3answers
611 views

Memory size for kernel mmap operation

I'm interested in the way Linux mmaps files into the main memory (in my context its for executing, but I guess the mmap process is the same for writing and reading as well) and which size it uses. So ...
2
votes
1answer
245 views

tripwire report - inode number

Hi I am investigating tripwire and have stumbled upon something which i am unsure about. in a tripwire report generated after i modified hosts.deny to include an extra # I noticed the inode number ...
54
votes
5answers
41k 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, ...
20
votes
7answers
39k 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 ...