Tagged Questions
2
votes
2answers
76 views
How does Linux know the Location of File Data on Disk
related to: What is a Superblock, Inode, Dentry and a File?
None of the famous metadata structures hold onto to location data for the actual file. Dentry maps names to inodes, and inodes store ...
4
votes
2answers
69 views
How to upgrade shared library without crash?
Here it says that you can rewrite an executable file and the process will run just fine - it will be re-read when a process restarts.
However, when I try to replace a binary file while the process is ...
3
votes
2answers
69 views
How can I backup a directory to NTFS while preserving Unix file attributes?
I want to make a backup of my home directory to an NTFS partition (an unfortunate limitation). However, when I last tried using just cp, the attributes (owner, etc) went away. How can I make a backup ...
1
vote
3answers
32 views
Is there a robust way to cache contents of usb on local hd?
I'd like to switch between working on a laptop with a debian vm and a desktop pc running debian while carrying all my work files in a usb. Is there a robust way to automatically start caching the ...
0
votes
1answer
122 views
how are directories implemented in UNIX filesystem?
This question is extension to How are directories implemented in Unix filesystems?
I'm aiming to implement basic filesystem: After reading inode number and name we come to know Name of file and hence ...
1
vote
2answers
77 views
Cannot access any files Manjaro Linux
I cannot open any files on my Manjaro Linux laptop. I really can't remember why it happened but I restarted my computer and now I dont have read/write access to any folder or file even though I've ...
0
votes
0answers
100 views
Log4j File Location
I have a Webapp running on an Amazon EC2 Linux AMI. I've been trying to configure my Log4J file for logging but haven't been able to figure out where the logs are getting created.
This is my log4j ...
0
votes
1answer
74 views
Debian VirtualBox Guest - Common Files to Remove for Space Saving?
I have created a VirtualBox guest using debian-6.0.7-amd64. I am using it as a clone template to create Java work nodes, so my needs are pretty much limited to the JVM, networking, SSH and the basics ...
2
votes
3answers
68 views
How to prohibit from changing an owner of modifiable files?
I sometimes need to run a Qt Creator from root. After that, some config files of Qt Creator suddenly have a root as an owner. Therefore when running Qt Creator as user, I am getting nag warnings about ...
2
votes
2answers
147 views
dynamic file system with hooks
Is there anyway in linux (I don't care which distribution or flavor) to have a dynamic file system with read/write hooks? For example I would like to mount a dynamic file system at /dynamic and ...
3
votes
1answer
44 views
Emulating a file
I have certain application that opens a file with given path (presumably with fopen or derivative), reads the file, possibly writes to it and closes it. I have no control over this application other ...
2
votes
2answers
51 views
Download copy of file which updates on change
Sorry about the title, I didn't know how to write it - It's kind of confusing.
Ok, I am using my Raspberry Pi (Debian) and I store code on this server in which people have access to. My problem at ...
1
vote
1answer
53 views
How do I give global access to a file in a private folder?
For example, I want all the files in /home/trusktr/Downloads/ to remain hidden from other users, except for one.
I tried chmod 777 /home/trusktr/Downloads/someFile.avi but someFile.avi is still ...
2
votes
2answers
70 views
'tie' [nonexisting] files to programs
Recently, I just had an idea which turned out to be pretty useful under certain circumstances. But first some simple explanation:
In Perl, you have the option to tie variables to some functions ...
3
votes
1answer
178 views
Removing files that do not exist
I apologize for the possibly misleading title, but it is the best way I could think of to describe the problem, which is: I have several files that I can cat, but when I try to rm them I get a "No ...
1
vote
1answer
146 views
Trigger action each time a file is modified [duplicate]
Possible Duplicate:
Can a bash script be hooked to a file?
Is it possible to mount a mechanism to a file to perform an action (e.g. mark the change in some log file and such) each time the ...
2
votes
1answer
168 views
Sphinx Search shutting down after `FATAL: accept() failed: Too many open files`
I'm running Sphinx Search Server V2.06 ( the latest stable release ) on an Amazon EC2 with Linux CentOS. In general it is running fine, but the searchd.log is showing this error over and over with ...
1
vote
1answer
392 views
cannot 'ls' /mnt directory
I have a CentOS-6 machine that I'm working on that is running a live database. It's having a problem with the /mnt directory. I cannot ls the directory for some reason. stat is working and shows ...
10
votes
3answers
1k views
What happens when you delete a hard link?
If you do rm myFile where myFile is a hard link, what happens?
3
votes
3answers
182 views
Why do I get 3048 MB from a 64 MB flash memory?
I have a Linux based STB (set-top-box) and it features a 64 MB flash memory and 256 MB of RAM. I wanted to take a backup of some of my settings before I flash it with another image, but I wasn't sure ...
2
votes
1answer
195 views
referring to files inside a jar or zip files in Linux
I am wondering if I can refer to files inside JAR or ZIP files using URLs. I mean, without using a tool (such as the Java Jar utility) but just at the operative system level.
For example, if I have a ...
3
votes
1answer
195 views
How does the Linux file structure work?
I see the different folders bin, dev, mnt, proc, srv, sys, etc.
What are the properties of all these different folders? What are there purposes? Are there files in some of them that I should not ...
3
votes
4answers
332 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 ...
11
votes
6answers
1k views
Which extension to use for text files? (Unix/Linux)
I noticed that I can read text files without an extension .txt just fine. How come? Should I save these files with or without the .txt extension?
Also, what about .ini files? I usually use them like ...
3
votes
2answers
71 views
Technology / program selection for picture viewing software
I want to learn some Binux usage and/or programming skills and provide an easy to use browser based picture gallery on my local home network. My idea is to have a server machine, that is the Linux ...
7
votes
2answers
416 views
How to check if two directories or files belong to same filesystem
What's the best way to check if two directories belong to the same filesystem?
Acceptable answers: bash, python, C/C++.
1
vote
1answer
179 views
wdfs mount problem
I'm running Fedora/Gnome 3.4.2 64bit and I'm trying to mount a webdav file system to work with.
As root, I run the command
#mkdir /mnt/webdav
#wdfs https://www.webiste.com:port/directory ...
-6
votes
3answers
152 views
File name in file system
I have a strange question about file system in Unix. Why isn't it possible to give the same name to two files under same directory ?
Wouldn't it be possible to use IDs to differentiate between ...
0
votes
0answers
93 views
Real copy to Android device
When i copy files to the Android phone, they are copied to some cache, but they aren't written. I don't like it, because i don't know what is done.
I've tried these methods:
copying via thunar file ...
5
votes
2answers
3k views
Is it possible to compress a very large file (~30 GB) using gzip?
Is it possible to compress a very large file (~30 GB) using gzip? If so, what commands, switches, and options should I use?
Or is there another program (preferably one commonly available on Ubuntu ...
5
votes
1answer
123 views
Can non-canonicalized forms of filesystem paths be significant? (eg. “foo//bar”, “foo/./bar”, and “foo/../bar”)
I have a script for building a particular flavor of GCC cross-compiler. Throughout the script there are many paths that are not in canonical form, such as duplicate path separators (/xxx/foo//bar/yyy) ...
1
vote
1answer
105 views
Reclaiming space from one filesystem to give it to another without LVM
I want to add one file system space to another file system.
/dev/cciss/c0d0p2 152358920 143606116 888588 100% /db2
/dev/cciss/c0d0p15 203899764 50767420 142607764 27% /db2/ade/sapdata1
...
3
votes
1answer
215 views
How do I transfer files to a SunOS server via sftp with FileZilla?
According to the admin of the webserver, I should be able to use Filezilla to transfer files to the server but I am getting an error.
I set up Filezilla for transferring files sftp - using these ...
6
votes
1answer
241 views
Stacked filesystems with write-back
I need to setup a system where a laptop and a desktop computers coexist.
The idea is, I bring the laptop into the network and the laptop syncs the /home directory( with some exceptions) with the ...
2
votes
1answer
729 views
Linux Ubuntu - 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 ...
0
votes
1answer
84 views
Is there an application to find similar documents?
Is there any good software that finds groups of multiple files that are similar, or where one file includes a part of another?
I have a directory with lots of files mixed up. Among the files, are ...
0
votes
2answers
935 views
How to write a file at various offsets to a filesystem partition with dd command
Requirement
I want to write a file at various offsets into the partition
Partition /dev/part2 is mounted at /mypart
I tried the command below:
dd if=/dev/urandom of=/mypart/aaa bs=1024 seek=0 ...
3
votes
3answers
704 views
In Mac OS X Snow Leopard, how can one file's permissions be matched to another?
I need to make the permissions of a file exactly match the permissions of another file in OS X 10.6.
I don't see 'getfacl' or 'setfacl' as suggested in some other posts for Linux. And, it doesn't ...
3
votes
1answer
1k views
bash force copy over same file
Our sysadmin has created a backup system that creates snapshots of the hard drive.
When I try to restore an older version from the snapshot:
cp /path/to/snapshots/foo.bar /path/to/folder/foo.bar
...
4
votes
2answers
121 views
Can I move a directory with open files?
Imagine a bunch of processes using a /home/user/logs directory. They have some logs open for a longer time.
5
votes
1answer
381 views
Immutable bit on AIX?
Under Linux I can:
chattr +i SOMEFILE
so that even root can't modify the SOMEFILE. Are there any similar solutions for AIX?
2
votes
2answers
86 views
What file system is my file on?
How do I figure out which file system a given file/directory is located on?
(For example, I would like to know if the file/directory is a temporary file in RAM, or if it's stored on disk. And what ...
13
votes
1answer
5k 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% ...
11
votes
5answers
6k views
Script to monitor folder for new files?
How do I detect new files in a folder with a bash script? I would like to process the files as soon as they are created in the folder. Is this possible to do so or do I have to schedule a script with ...
2
votes
1answer
2k views
Is the file table in the filesystem or in memory?
In the context of operating system control tables, does the term "file tables" refer to a data structure that is part of the filesystem, or that is in main memory (and in which case I assume it would ...
7
votes
3answers
906 views
Why is sorting files by access time not working?
I tried to use command
ls --time=atime
it was working in one directory but wasn't working in another directory.
I opened certain files in vim, evince and other applications but after the
command file ...
8
votes
4answers
1k views
How are directories implemented in Unix filesystems?
My question is how directories are implemented? I can believe a data structure like a variable e.g. table, array or similar. Since UNIX is Open Source I can look in the source what the program does ...
3
votes
2answers
168 views
Sometimes I feel like a directory, some times I feel like a regular file
For organizational purposes I would like a certain filesystem object which most of the time appears as a file, on occasion, to appear as a directory.
The basic idea is that generically for cp, mv, ...
4
votes
3answers
2k views
How do I open a .bak file on Linux?
I have received a file of .bak format, let it be foo.bak. I don't know if it is a MS-DOS file or Linux/Unix file. What I know is that I can't open it because my Linux (Ubuntu) does not give any hint ...
1
vote
3answers
297 views
Fast incremental searching of files from shell
I like the command-t script in vim editor that is able to intelligently and incrementally search for files. Is there some similar program that is able to search from shell? It would be great if it ...
