General :: Different File Size After Copy
Feb 27, 2010
Firstly, I did perform a search on this problem in these forums, but didn't quite get what I was looking for. So I hope I don't yelled at for making a duplicate post. So I used rsync to backup my webroot to another nix machine. du -hs gave me 1.3 G on the source machine and 1.1 G on the backup machine. I tried to compare the individual files and noticed a trend. The files on backup machine were always smaller than the files on source machine. The source uses SATA drive, destination uses IDE. So this time I rsynced locally to another folder on the source machine. Same size anomaly. So i did a simple cp file ~/file and same size anomaly. So it's not a rsync issue.
I took a file and ran md5sum on both, the source file and destination file. To my surprise, even though the file size was different, they had the same md5sum. Now, let it be known that the source machine is a production server and the dir i rsynced was being used, serving pages to the web. I googled about this and came up with stuff like open descriptors and holes. I don't understand this stuff and was wondering if this was really the case. What are those if it is the case? And my backup copy is 100% identical right? There are thousands of files and I ran md5sum only on couple. Can I take comfort that when time comes, I can restore using my backup without any problems?
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Mar 1, 2011
How to copy a Read-Only file in Linux and make the copy writable with a single cp command in Linux (Ubuntu 10.04)? The --no-preserve and --preserve seemed to be good candidates, except that they should "and" the mode flags, while what I am looking for is something that will "or" them (add +w mode).
More details: I have to import a repository from GIT to Perforce. I want that all Perforce depot files are Read-Only (that is how Perforce was designed), while all other files that were derived/copied from depot files are writable. Currently if a Makefile tries to copy a Read-Only file then the derived file will also be Read-only. This leads to build-errors when cp tries to overwrite Read-Only file second time. Of course the --force is a workaround here but then the derived file is also Read-Only. Also I do not want to mess with "chmod" after each "cp" command - I will do that only as the last resort.
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Mar 19, 2011
I have written a script.
#/bin/bash
a=`du -sh /root/samplefolder | cut -f1`
echo $a > testfile
[code]....
The aim of this script is, when the folder reaches 20M then attributes will be set to that particular folder so that no newfiles and folders cannot be created or copied to that samplefolder. whenever i copy a file morethan 20M to that folder its getting copied fully and then the attributes were applied. But i dont want this to happen, when the folder reaches its maximum current write operation to that folder should be stopped automatically with a error.
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Jun 10, 2010
Are there software that can split big file size into small file size in Linux?
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Jun 13, 2011
I was just testing specifying limit on file size to a user and have added the following to /etc/security/limits.conf bob soft fsize 100 This basically should have said not to allow bob to create anyfile greater than 100Kb in size.
But the interesting thing is, if bob already has any file which is greater than 100Kb in size, it even doesn't allow to log him into the system both from console and SSH. Also nothing is logged in logs.. How do I configure it so that, bob can login to the system even though he has any file greater than 100Kb (but doesn't allow him to create file which are greater than 100Kb) ??
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Jun 14, 2011
I have just been bothered by a fairly small issue for some time now. I am trying to search (using find -name) for some .jpg files recursively. This is a Redhat environment with bash.
I get this job done though I need to copy ALL of them and put them in a separate folder BUT I also need to keep the order intact after copying.
For e.g - If I get a JPG file under /home/usr/new/1/ then the destination also needs to be /test/old/new/1/.
At the moment, I am simply putting all files under /test/old/ and I can't somehow get the later /new/1/ folder path created under /test/old/
I understand this could well be done using while OR if else loop, though if someone can just guide me with a hint, I would be really grateful.
I will complete the rest of the steps and was asking here since I am still not comfortable with the shell/bash scripts yet and planning to be really good at it over the next couple of months.
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Jun 3, 2010
I had a situation in which the the path of the file to be copied is written in other file and I had to copy it using shell script..I can use cp $(cat /home/robert/location.txt) /media/sda1 on normal linux shell...But I am using buildroot script where $(cat /home/robert/location.txt) evaluate to nothing..is just blank..
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Jan 19, 2011
is lvresize with --resizefs options re-size the Logical Volume and then re-size the file system? i mean we don't need to use resize2fs?I looked at man pages but it doesn't explain this option.
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Dec 14, 2010
How can we find the maximum size of the inode table and what decides it, and how the maximum size of volume of file system is decided ?
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Nov 16, 2010
I have an embedded linux system (Debian 'Lenny') which booting from a microSD flash. If I make a copy of a file on the flash file system (cp test test1) and then power off (disconnect power spontanious). Connects power again and the system come up, but the file test1 is gone. How can I secure that test1 is NOT disappear if the power get lost?If I copy file and then restart system with reboot command, the file test1 does not disappear.
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Sep 19, 2009
favor and let me know how can I copy some text in one file and paste it to another file ,when both of the files are being opened by vi text editor ?
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Oct 18, 2010
I have a C-function that create a file and then make a copy in the same directory, but somethin is wrong with permission or owners.The program starts as root user.The file creates by the program:
-rwxrwxrwx 1 root staff 199680 Oct 18 10:58 test
Ok, but after copying the permission is not the same.The file after copying (with new name) by the program:
-rw-r--r-- 1 root root 199680 Oct 18 10:58 test_copy
I want to have full permission of the copy, how to do??
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Jan 27, 2010
I have a large number of folders that each contain quite a few files of varying sizes (from a few bytes to 400kb or so), mostly smaller ones. I need to get the actual (not the disk usage) size of these folders. Is there any way to do this with a command like 'du'?
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Mar 22, 2010
There seems to be a limit of 2 gb on files. Im trying to add my music files and have about 7 gb. Is there a way to make a file that will allow the extra info.
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Mar 11, 2010
I found one weird behavior.The file i copied from a server is almost doubled the size from the server.How come?
example:
720K ./xxxx vs 360K ./xxxx
(my pc) vs (server)
I have checked both filesystem are ext3
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Oct 31, 2010
How to reduce the size of a file. Is truncate related to this?
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Nov 30, 2010
i have this directory with multiple images 'pics' and the size is 20mb, and i want to make a .zip or .rar package of this directory but with an increased size so the .zip/.rar file will be 100mb, and then when you extract it the file size is the original 20mb
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Mar 1, 2016
I think I basically need to know whether it's possible to copy a partition whilst converting inode size, or if I need to create a new partition and copy the contents.
To give you the back story..
I have a system with 1 SSD and a raid array of 4 physical disks. One of the raid disks died, so I swapped it out, only to find the system wouldn't boot (had no bootloader?). I fired up a live session, and tried grub-install, but get an error like "The file /boot/grub/stage1 not read correctly". Looking into it, it looks like the problem discussed here which is basically something to do with the partition having an inode size of 256 instead of 128.
Taking a step back for a moment.. I can't really remember installing this system, but is it possible I partitioned the SSD to ext4, with a default inode size of 256, then when the installer tried to install grub, it basically refused to install it on the SSD, so offered to install it on one of the raid disks, which happens to be the disk that died? So until now, unbeknown to me, the bootloader has been on one of my raid disks, while the root (bootable?) partition is on the SSD. That's my best guess as to what's gone wrong anyway..
Anyhow, currently this system has the SSD with the small bootable partition with an inode size of 256. As luck would have it, the new raid disk is sitting there not doing anything yet, so I have the space needed to copy that partition or it's contents onto the new raid disk.
So the question is, can I convert the inode size whilst copying the partition? Or do I need to just clone the partition, then create a new one with the correct inode size, then copy the contents of the old partition to the new one? In the latter case, is there any hidden secret sauce that won't be copied with `cp -R` or so? I mean, if I just create a partition with the correct inode size, and flag it bootable, then `cp -R` from the old partition to this new one, will it be functionally the same? or is there something special I need to do because this is the root OS partition?
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Oct 1, 2010
When i do cp filename destinationfolder it isn't happening. I don't get any error messages or any indication that the file copy didn't happen. But when I go to the destination folder and do ls; the file(s) not there. I tried it with sudo also and i get the same results. When I first did the copy it actually copied it somwhere but not where i wanted it. It copied it to folder name Desktop. So i tried copying it from Desktop and again same results.
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Jun 23, 2010
I m trying to take backup of a file using ssh.I have written a command like following.Which will take backup of vm.cfg as backup.cfg...How would i modify my query?
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Feb 26, 2011
I'm using ubuntu and I'm trying to copy a .iso file to a dvd. I have k3b at my disposal. My problem is that the dvd is not empty, and I'd like to overwrite it or wipe it before copying the new .iso, but k3b displays an error if I try to overwrite it, it says it doesn't have the necessary rights and proposes me to use k3bsetup. I have it too, but I don't know how to use it.
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Jun 22, 2010
I am using SSH to connect to a CentOS server and I want to get the file in mb of some files and folders, how can I do it?
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Jan 14, 2010
Should the swap file be as large as possible or as small as possible providing a person has 8GB of installed ram.
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Aug 15, 2010
I have copied some vides from my camcorder and the size seems a bit excessive - 140mb for 3 mins! Is there a program I can use to save the .mp2 file as .mpg and reduce the size?
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Nov 16, 2010
Multiple dirs full of mp3s All strictly encoded with exactly the same parameters (CBR 128kbps, Joint-Stereo, etc) Is it possible to determine the total playing time (to within ~98% accuracy) by some formula based on the total file size? I say ~98% accurate since ID3 tags do consume a small amount of space.
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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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Nov 30, 2010
i have a folder with 10 files and i would like to determine the size of each file. i was trying the command
Code:
du -sh foldername
but i receive the total size .
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Apr 4, 2009
I am developing a Web-based application and have some folders that will generally reside outside of the Web accessible area of the server. However, since some people will not be able to store those folders outside of the "public_html" folder, I am looking to put a blank "index.php" inside of every folder within that section of the application. To make things easier, I would like to know if there might be a way to recursively copy one file into every folder in a certain location.
In other words, is there a command that might do something like:
Code:
> cp -R index.php /home/user/public_html/source-files/*
Basically, I want every directory inside of "source-files" to get a copy of "index.php". The directory hierarchy within "source-files" can go at least three or four levels deep, so the command would need to be recursive. I am looking for a command-line statement that I can type to perform this action.
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Aug 24, 2011
I want to transfer a huge file (60GB) over the NFS network on linux. Is cp the best option?
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Mar 26, 2010
I'm trying to copy a 6Gb file across from my laptop to an external usb drive but it quits at about 4.2Gb every time with a "file size limit exceeded" error. i have checked the output of ulimit -a and there is no limit there on the file size. I'm using the Slax live Cd for this as it always gets the job done
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