Use this tag for questions about file management and operations on files.

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0
votes
1answer
9 views

How do I `avconv` every m4a in a dir to mp3s?

So I'm trying to convert lots of m4as to mp3s, and I think the best way to do that is using avconv. The problem is, I can't seem to find any solid examples on how to use avconv. Looking at the man ...
1
vote
1answer
83 views

Difference between cat * and cat * >>

To merge multiple files in a dir I have tried: cat * myfile.log but this seems to just merge line and line and is thus very slow So using instead: cat * >> bigfile merges the files much ...
4
votes
2answers
37 views

modify file ownership for files inside tar archive

I am working as user, and I would like to create a tar archive, which when unpacked (by root) will extract its files with root ownership (otherwise root would have to change the ownership manually for ...
3
votes
1answer
31 views

How does the system know when a file has been modified? In particular memory mapped files

If I am looking at a process from outside the process how can I tell which files it modifies? One thing I can do is track calls to write, but a process can map a file to memory and write to the ...
2
votes
1answer
100 views

Why do deleted files continually reappear?

I've been having a strange issue recently, where I would delete files from a location (i.e. Desktop), and then empty the Trash. However, a day or so later (I'm not sure exactly what triggers it), the ...
5
votes
2answers
68 views

Remove Linux directories containing ONLY old files

We have numerous directories that each contain 2 files, one of which is a hidden file. We want to remove all those directories and their contents that contain ONLY files that have a modification date ...
14
votes
3answers
423 views

Move files and change ownership at the sametime

On Linux (Debian, Ubuntu Mint...), Is there any option command or something that I can use to transfer files to another user without having to do : sudo mv /home/poney/folderfulloffiles ...
13
votes
5answers
15k 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
3answers
51 views

Compare two files for matching lines and store positive results [duplicate]

I have two files. File 1: A0001 C001 B0003 C896 A0024 C234 . B1542 C231 . upto 28412 such lines File 2: A0001 A0024 B1542 . . and 12000 such lines. I want to compare File 2 against File 1 ...
17
votes
4answers
884 views

Is there an “open with” command for the command line?

Does the command line have a way to get a recommended list of programs used to open a particular file, based on the file type? For example, a .pdf file would have an open with... recommendation using ...
2
votes
1answer
39 views

Display file using Dialog

I have a file on disk which contains some text I want to display on the screen. You can do it like this: dialog --yesno "`cat FILE`" 10 100 However, I'm concerned that if FILE becomes large, I'm ...
2
votes
1answer
709 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
3answers
92 views

How to write a Java Program / Shell Script combination such that you can call the Java program as a remote command and yet supply a local file?

This is related to How to execute a remote command on a local file? I wrote a simple Java program that prints the first line of a file - import java.io.BufferedReader; import ...
4
votes
1answer
39 views

Sharing a local directory between local users with full permissions

How do you share a directory /home/shared between two users "eris" and "discordia" such that both can access the directory in their respective home directory, e.g. /home/eris/shared and ...
13
votes
3answers
2k views

Why isn't there any shell command to create files?

Attention please: I am not asking how to make a file from the command line! I have been using touch for making files for years without paying attention that its main purpose is something else. If ...
4
votes
2answers
82 views

Opening a file with program in background from shell

The command to launch a program, say evince, from bash shell in background is evince & But what if I want to open some file with evince in background? Nor evince myfile.pdf & neither evince ...
3
votes
4answers
163 views

How can I count all the files on my system from root?

I want to know the total number of files on my server. Can this be done?
0
votes
3answers
2k views

how to delete temp and log files with terminal on vps?

I'm kinda pretty new to this but anyone know how to delete any temp and log files or these kind of files on vps with terminal? I'm runnin debian on the vps. I'm troubled since I can't locate those ...
1
vote
2answers
29 views

tar specific files based on a pattern

I got a lot of files with the following format: 2014_04_01_11.txt 2014_04_01_12.txt 2014_04_01_13.txt 2013_03_25_12.txt 2013_04_29_15.txt I would like to tar all theses files into an archive 20?? _ ...
1
vote
1answer
80 views

File has bytes - appears to be empty

I'm having the following problem: Some text files (also some binary files) on my system are listed with the correct file size but when I open them, they appear empty. >ls -la -rw-rw-r-- 1 user ...
3
votes
1answer
29 views

Merging text files based on their filename

I have hundred of files with the following format: 2013_01_19_xyxyxyx.txt 2013_01_19_xyxyxyx.txt 2014_03_21_xyxyxyx.txt 2014_03_21_zxzxzxz.txt 2014_03_22_abababa.txt 2014_03_22_cbcbcbc.txt etc. I ...
5
votes
3answers
763 views

How do you compare two folders and copy the difference to a third folder?

You've got three folders: folder current, which contains your current files folder old, which contains an older version of the same files folder difference, which is just an empty folder How do ...
4
votes
7answers
484 views

How to split a filename list in 5GB sets?

I have a pretty big list of files which I like to group in smaller list of 5GB each for further processing. The file list is in the following form: "size" (from du) "tab" "absolute path", like this ...
2
votes
4answers
71 views

Can a running script identify the logging context?

Let us say I redirect the STDOUT, STDERR of a program to files. ./script.sh 1> output.log 2> error.log Can the running program find this out i.e. know the paths to these files?
3
votes
2answers
48 views

Can I safely read a file that is appended to by another process?

If process A copies files to some location loc and process B regularly copies the files from loc to some other location, can B read a file that is currently in the process of being copied to loc by A? ...
2
votes
0answers
21 views

File viewer (not manager) with dual pane

I have multiple papers, in multiple directories. let us call the papers A, B, C, D... and I have to write reports often, where I have to answer questions like Q1, Q2, Q3, Q4... Now, what often ...
2
votes
2answers
47 views

How to edit /etc/inittab?

I want to edit /etc/inittab in order to get a login prompt on the serial console once the system boots. By default, inittab file complains to be ro. I tried both gksudo gedit /etc/inittab and sudo vi ...
-2
votes
0answers
27 views

Alternative checks for ensuring correct file usage

Instead of targeting by file name, which can easily be duplicated or taken and assigned to a different file, what would be the safest (and perhaps most creative) check to ensure the correct file is ...
3
votes
1answer
499 views

Samba set share browsable only for a group

How I can configure samba to set browsable a share for a group only. I wanna hide the share for all other users, if a set browsable to yes all the users can see the share when explore. I don't want ...
13
votes
2answers
386 views

Is that possible to integrate zip and tar.gz files as directory into the file system

I wonder if there is a way to integrate (it's a bit different from mounting, I think) compressed files as directories into the file system? E.g., one could download a compressed-file.tar.gz to his ...
5
votes
3answers
114 views

Find the top 50 directories containing the most files/directories in their first level?

How can I use find to generate a list of directories which contain the most numbers of files. I'd like the list to be from highest to lowest. I'd only like the listing to go 1 level deep, and I'd ...
2
votes
1answer
47 views

Delete *.txt files by date between MMDDYYYY and MMDDYYYYY

How can I use rm to delete *.txt files between MMDDYYYY and MMDDYYYY ?
2
votes
3answers
40 views

How to know the path to a specific file in a zip archive, without extracting it?

I only know the filename but not its exact location. I would like to extract only that file from the archive. And I need to know its location in the archive.
1
vote
3answers
52 views

Create directories from a list of files with spaces in name

I have a directory with a list of files in it. All these files have spaces in their names. I would like to create a directory, for each file, with the name of the file except the extension (which is ...
2
votes
3answers
107 views

Merge 2 files based on all values of the first column of the first file

I need to merge below 2 files: file1: TABLES REF-IO HEAD-IO DIFF-IO test 200 500 -300 exam 2 3 -1 final 2 1 1 mail 4 2 2 TOTAL 208 506 -298 ...
2
votes
2answers
67 views

How to rename filename with ' or ? in file name?

I have a problem renaming a file that I'm not even sure which special characters I have in the file. I'm using CentOS 6 64bit. When I ls the file: Giko Suzo San?e - Ep1.avi but when view it in ...
13
votes
3answers
47k views

How to get over “device or resource busy”?

I tried to rm -rf a folder, and got "device or resource busy". In Windows, I would have used LockHunter to resolve this. What's the linux equivalent? (Please give as answer a simple "unlock this" ...
0
votes
1answer
55 views

. (dot) shows up as path separator [closed]

I'm hunting a really strange bug: arian@orel:~$ ls ._cache.<tab><tab> Display all 205 possibilities? (y or n) ._cache.apt-file/ ._cache.chromium/ ._cache.chromium.Default/ ...
1
vote
2answers
56 views

Merge 2 files based on all available values of the first column in both files

I need to merge below 2 files: file1: viewer 23 test 27 remark 2 file2: viewer 2990 exam 200 remark 240 merged file should be as shown below: type value1 value2 difference ...
1
vote
0answers
36 views

How to properly use USB sticks on Linux and Windows machines? [migrated]

I've been a Linux user for about a year (Fedora 20) and have had a persistent problem with USB sticks (USB from now on for short) since then. I use my USB in both Linux and Windows machines, and my ...
10
votes
3answers
350 views

Read the middle of a large file

I have a 1 TB file. I would like to read from byte 12345678901 to byte 19876543212 and put that on standard output on a machine with 100 MB RAM. I can easily write a perl script that does this. ...
5
votes
1answer
104 views

Why does “cat ttyUSB0” not produce output?

I connected an infrared receiver to a USB port ... (the last line of dmesg tells device file) $ dmesg [10496.596063] usb 7-2: new full-speed USB device number 2 using uhci_hcd [10496.751112] usb 7-2: ...
25
votes
2answers
17k views

How do I do a ls and then sort the results by date created?

In what order are the dated ordered by? Certainly not alphanumeric order. ls -lt sorts by modification time. But I need creation time.
2
votes
3answers
952 views

How do I mass-convert the “last modified” dates in a particular directory?

For example, say, I know that my time-offsets are off by several hours (perhaps because my system clock was a few hours ahead at a certain time). In that case, how would I mass-change the "last ...
1
vote
1answer
52 views

List files, directories and executables in current directory

I have php shell and I have function that do just that (but it give me error when I call scandir($path) function because of restriction in php), so I need to use my bash shell to do the same. It can ...
0
votes
1answer
54 views

undelete a just deleted file on ext4 with extundelete

Is there a simple option on extundelete how I can try to undelete a file called /var/tmp/test.iso that I just deleded? (it is not so important that I would start to remount the drive read-only or ...
2
votes
1answer
75 views

remove duplicate files in 2 directories

I have two folders (w/ subfolders) containing files that both contain essentially the same content. Example: /folder/files/data/new /folder/files/data/old Is there way to delete all files in /new ...
7
votes
1answer
51 views

Swap (exchange) two big files in limited environment

Let's say I have two flash memory devices 1GB capacity each. Let's also say each device contains one big file ~ 1GB size. Assuming, I have limited (64MB) RAM and no hard disk drive, what is the ...
2
votes
2answers
62 views

Shell Scripting: how to use part of the file path as the file name?

I have a group of directories, each containing exactly 1 jpeg image, like so- /psds/folder1/image.jpg /psds/someotherfolder/picture.jpg /psds/yetanotherfolder/thumbnail.jpg What is the appropriate ...
11
votes
2answers
2k views

recursive statistics on file types in directory?

I did a website scrape for a conversion project. I'd like to do some statistics on the types of files in there -- for instance, 400 .html files, 100 .gif, etc. What's an easy way to do this? It has to ...