Software :: Know Name Of File Which Owns A Block Number On FS?

Apr 24, 2010

I need to monitor file reads&writes by all the apps. I have found a kernel feature /proc/sys/vm/block_dump. But it only gives me block numbers while i would like to know file names. How can i convert these block numbers to file names (if the blocks belong to a file, of course)?

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General :: Hard Drive - Get Block Number / Position Of File On HDD?

Feb 28, 2010

How can I retrieve the block number(s) of a certain file in a file system (the blocks the file is using on the harddisc)?

I'm using the gentoo linux based SystemRescueCD, so I got plenty of tools installed which might get that information for me.

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Programming :: Algorithm - File System Block Number For Immediate Read

May 20, 2010

algorithm:breada
input: file system block number for immediate read
file system block number for asynchronous read
output:buffer containing data for immediate read {
if(first block not in cache) {
get buffer for first block
if(buffer data not valid)
initiate disk read }
if(second block not in cache) {
get buffer for second block)
if(buffer data valid) //line 1
release buffer else
initiate disk read //line 2 }
if(first block was originally in cache) //line 3 {
read first block
return buffer }
sleep (event first buffer contains valid data)
return buffer }

Here is an algorithm for block read algorithm. I have problem in
line 1: If buffer data is valid why is it releasing the buffer?
line 2: If buffer data valid why is it initiating disk read. It should have read directly from buffer?
line 3: It should be the first condition as if it is there in cache then it should return it without delay?

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General :: What's A File System's "magic" Number In A Super Block

Jan 28, 2011

I'm working on a midrange NAS system basically running on Linux and I got to do some great testing today. The step-by-step lead me to using fsdb to corrupt the magic number on a file system in order to corrupt it / test the script that should fix it.

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General :: How To Know Which Logical Volume Owns A File

Jul 14, 2010

Hi. We have a cluster consisting of 10 logical volumes all part of one filesystem. Is there a way to know which logical volume owns a certain file/inode? I have tried what is suggested at this link, but the output is the filesystem and not a specific logical volume.

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Hardware :: Always Getting Bad Magic Number In Super-block?

Jul 1, 2010

I've been setting up a number of netbooks for friends in a group I belong to. I am installing Ubuntu 10.04 and/or Linux Mint 9 on all of the netbooks. The netbooks are all identical. Everything has seemed OK until yesterday. I tried to set the label on the new disk using: # e2label /dev/sda newlabel The error is Bad magic number in super-block while trying to open /dev/sda. Couldn't find valid filesystem superblock.

But the filesystem seems fine. It is mounted. It booted up without errors. But all the e2* tools give the same error. So I checked another netbook with an identical fresh install of Ubuntu 10.04 32-bit. It gives the same error although the system appears to work fine. Next I went and checked my own netbook. It is identical except I swapped out the HDD for an OCZ Vertex SSD. I aligned the partitions and prepared that drive carefully. It seems to work great. But when I ran e2label on it I got the same error message.

All the other installs are fresh, clean, standard installs where I let the installer use the whole disk and do the partitioning automatically. All are using ext4. I did a fresh install of Linux Mint 9 and it has the same error as Ubuntu 10.04. Kubuntu 10.04 on my desktop gives the same error too.

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Security :: Ssh - Sshd Parameter To Set To Block Out User After Number Of Attempts Tp Login?

Apr 28, 2011

Is there an ssh or sshd parameter that can be set to block out a user after a set number of attempts tp login ?

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Ubuntu Networking :: Program \ Use To Monitor The Number Of Computers That Are Connected To Network And Block Them?

Feb 1, 2011

i have recently had a house mate move in and he is using my wireless network, even though i asked him not to give out the network key to his friends either he has or they have hacked my network and are using it when they come over, is there a program i can use to monitor the number of computers that are connected to my network and block them, or is there a way i can just wee what is going on. They seem to just connect and i don't want to have to change the password particularly because that involves changing it on multiple devices.

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Hardware :: Mem - 'input Output Error On Sr0 Logical Block (a Large Number) After A Long Time The Booting Proceeds To A Point

Aug 29, 2010

I have been having a lot of trouble lately with installing from CD/DVD. The DVD reader/writer on this laptop is new. Nevertheless, trying to install Ubuntu onto an exernal HD, I get 'input output error on sr0 logical block (a large number) After a long time the booting proceeds to a point, but I never get the actual installation started, and have to shut down manually.

The CD is fine, says the Ubuntu-checker. I just installed using my sons laptop, and there was no trouble. Question: does this indicate a motherboard failure? A memory block damaged? Do you know of a diagnostic tool I can use to check the reading of a CD/DVD?

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General :: Always Create Files/folders But Only Write To Those The User Owns?

Aug 14, 2011

I need 2 Linux users to share a folder. Within this folder, users should always be able to create files and sub-folders and write into any sub-folder (whether they own it or not). However, they should only be able to edit the files they actually own.

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Ubuntu :: Obtain The User That Owns The Process From /proc/process_id?

May 29, 2010

How can I obtain the user that owns the process from /proc/process_id? Is it the Uid in /proc/process_id/status ? If so why are there 4 values there?

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Ubuntu Multimedia :: Which Package Owns/maintains /etc/asound.conf

Jul 11, 2010

Which package owns/maintains /etc/asound.conf? I thought it would have been alsa-base, but I uninstalled alsa-base, and the file was still there.

I have a suspicion that I messed with my /etc/asound.conf file and I would like to regenerate it. I was thinking a simple reinstall of the package that owns this file.

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General :: Overwriting The Middle Of A File From A Block Device *without* Truncating File?

Jan 15, 2010

I have a Linux (Kubuntu) system with a large (~20Gb) file which I would like to mess with. Specifically, I want to copy the entire contents of another large file (~12Gb) to the middle of this file, and keep the bits of the file which are not overwritten.This is what I want to happen, with the text between the pipes representing file contents:Before:

outfile: |abcdefghijklmnopqrstuvwxyz|
infile: |123456789|
After:

[code]....

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Ubuntu :: Shell, Auto Append Number To File And Read From External File?

Oct 31, 2010

Code:
cat ${SOURCE}/{start,universal,index,end}.txt > ${SERVER}/index.html
cat ${SOURCE}/{start,universal,02042010,end}.txt > ${SERVER}/02042010.html

[code]....

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General :: Script To Insert Number Of Lines In A File To The Start Of The File?

Sep 17, 2009

I'm looking for a way to insert the number of lines in a file to the start of the aformentioned file. This should be simple but as I am not used to scripts in Linux, I am finding it tough going. I can find the number of lines in a file easily enough via

filesize=$(awk 'END {print NR}' $1)

but as for inserting this into the first line, i'm failing to do so. I've tried some of the other approaches on these forums but none so far have been able to do so.

I've tried:

sed '1i$filesize' $1

but sed i requires a string, not a variable so no go I've also tried:

mv "$1" "${1}.bak" 2>/dev/null || touch "${1}.bak"
cat $filesize "${1}.bak" >"$1"

but again with no luck as cat seems to need an input stream Just to recap, i want to insert a line at the start of a given file that holds the number of lines the original file has.

ie the file:

a
b
c
d
e

should become:

5
a
b
c

[code].....

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Red Hat :: File System Corruption - Super Block Could Not Be Read Or Don't Describe A Clear Ext2 File System

Jul 12, 2010

My Redhat Enterprise Linux 4 with 6x partitions (/, /boot,/home, /usr, /var, /tmp) of 6.0 GB IDE Hardisk was working quite fine. I decided to create LVM on /home and /var partitions but due to some errors occured and I delete the /home partitions. That's why partition table altered. I then delete 4,5,and 6th partitions (/home, /var, /tmp) partitions and now try to create one by one but following error is coming:-

[Code]....

The Super block could not be read or do not describe a clear ext2 file system. E2fsck b 8193 <device> I have tried following commands,but could not successful:- e2fsck -p /dev/hda7 (where hda7 was created but afterthat it was deleted) e2fsck -a /dev/hda7

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General :: Max Number From The Name Of A File?

Mar 24, 2010

I need to get the max number from the name of a file

Formant of the file name:
[a-zA-Z]*_[0-9][0-9]_[A-Z][A-Z].log
Delimiter as underscore '_'

[code]....

known part in the above file name will be GA.log A give directory may or may not contain files in the above format or may contain file other then the above format if so then ignore it.

Eg:-

1) Directory=/tmp/log having below listed files

ant_01_EG.log ant_02_GA.log ant_04_EG.log cvs_01_EG.log cvs_02_GA.log cvs_04_EG.log master_01_GA.log master_03_EG.log master_04_GA.log

[code]....

output=> 06

2) Directory=/tmp/log no files

cmd=> ls *[0-9][0-9]_GA.log 2> /dev/null | awk -F_ '{ print $2}' | sort -nr | head -n1 | awk 'BEGIN { if ($1 >0 ) x=0; else x=1 } END {printf "%02.0f
", $1+1}'

output=> 01

if there are no files the output should be 01 and if file(s) found the output should be next highest number+1, In the above example it is 06 My cmd is bit lenghty. reduce my cmd and it should be in one line.

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Debian :: How To Block Download File

Feb 3, 2016

Is it possible to block download file from sambashare folder ?

For example pdf file frem debianInfo est.pdf I wat to provide only for read from this share.

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General :: Searching For Number Within A File?

Nov 9, 2010

I'm currently trying to design a small, simple enough shell program for area codes. I have a list of area codes in a database, and I am trying to write a program that will have a user input an area code, and then have the program print out information that immediately follows that area code in my database. I assume I need to use a find or locate command, but I'm not sure if I should be searching for a string or the number itself. The number could possibly occur at some other point in the file, though the way I have the file set up it only occurs once at the newline.

what function I should use and how I should go about it? As is I only have the absolute bare-bones beginning of having an echo for the prompt to input an area-code, and the read once it's input. Without the find I'm not sure how much farther I can get. Also, would it make it easier if I added some character such as a ! to the end of the number at the newline to make it easier to search for? With a macro that would be easy enough to do.

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Networking :: Squidproxy Cannot Block Executable File?

Aug 4, 2009

i am using now the squidproxysome tutorials i followedwhat i want is to restrict downloading of any exe file, mp3, even a video extensionsince my squidproxy running some exe is blocked for example i just want to download pidgin.exe and its giving me an information that i have no rights to download but on this site rlook-fing-1-2this exe i can able to download and i dont know why?

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Software :: File Operations Through Block Driver?

Jan 25, 2010

i have written block driver. its got registered succesfully.now i want to perform file opration like opening file reading/writing data into file which is stored into device.fter registration device node is created under /dev/xxx i am not getting, through this node how to open file which is stored in device.from one document i came to know that i have to use filesystem but in that doc how to use filesystem is not explained

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Programming :: Extracting Block Of Text From Log File?

Nov 22, 2010

I have a log file and want to extract all blocks of text that start with START and ends with END. Each block is 5 lines.

Code:
--- START
blah blah blah

[code]...

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General :: Samba On Fedora 10.10 - Originator Of Docs "owns" It - Other Users To Share - Save As

Mar 10, 2011

Winxp and Win7 - conencting to a Samba server.

Everything is working fine except for one thing .

To best explain this problem .........

Share name - "admin-public"

Everyone can access it.

Everyone can create new docs and edit / save them.

BUT - only the originator can edit / save.

Everyone else has read only access!

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Debian :: In Xnee Session File What Is Each Number

Sep 21, 2015

cnee makes xnee session file .xns. In that file, each line has 9 numbers. What does each number mean?

I have xnee 3.19. I looked in this pdf file, but could not find the answer.

XWindow System Protocol, XConsortium Standard, XVersion 11, Release 6.8

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Ubuntu :: Recover File - Don't Know The Inode Number Of It?

Jan 3, 2010

How can i recover a file if i don't know the inode number of it? Is there a way of scanning the hard drive for inodes that has no reference?

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General :: Find Inode Of A Particular File Using Its Number?

Nov 16, 2010

Can we find the inode of a particular file using its inode number?

The reason is i want to know how many blocks are occupied by specific file.

if we consider block size of 1K.
if the file size is of 100 bytes. In such a case, when the file is
stored on disk, the file will occupy 100 bytes or 1K (since we have
choosen block size to be 1K) ?

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General :: Comparing A File Size To A Given Number?

Jul 26, 2011

I'm trying to write a script that takes two arguments, the first argument is a number, and the second argument is a filename. The shell script should indicate if the file's size is BIGGER or SMALLER the number provided. this is what i have sofar, am i on the write track, i'm hoping its just a problem with my if command

if [ $1 -h $2 ]
then
echo "$1 is bigger than $2"
else

[code]....

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General :: How To Grep Negative Number In File?

Mar 4, 2010

I wanted to grep the line in a file starts with -1.000000e+00.

Tried grep "-1.000000e+00" *, got error "grep: invalid option --".
Neither of the following works:
grep "-1.000000e00" *
grep "1.000000e00" *

How do I grep a negative number with scientific notation?

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General :: Isolate A Number From A Text File Using Sed?

Mar 27, 2010

I'm trying to isolate a number from a text file using sed. The text file looks like this:

-GARBAGE-GARBAGE-GARBAGE- Number of frames: 183933 frames Codec -GARBAGE-GARBAGE-GARBAGE-

I tried the following:

Code:
sed "s/^.*Number of frames: //g; s/ frames Codec.*$//g" "info.txt" > "frames.txt"
Strangely, it only seems to be stripping off the end, but not the beginning, like so:
-GARBAGE-GARBAGE-GARBAGE- Number of frames: 183933

I'm obviously not using the command correctly, so what am I doing wrong?

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General :: Show The Number Of File On Folder?

Oct 21, 2010

My folder have some files and I want to show the number of files on folder at "Total file on folder: " Ex: Monday folder have six files and it will show "Total file on folder : 6" when I run a script. This is my code :

#!/bin/sh
if [ -d /home/kenzo/Monday/ ] && {
echo "Monday"
ls -l /home/kenzo/Monday/

[code].....

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