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

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13
votes
1answer
25k views

How to redirect stdout and stderr to a file and display stderr to console?

I know how to redirect to a file, and use tee; on a basic level. So $ alias outanderr='bash -c "echo stdout >&1; echo stderr >&2"' # A fake "application" displaying both output and ...
2
votes
3answers
156 views

determine user-modified files

I plan to reinstall my operating system since I messed up some stuff. Access to files and folders is painfully slow sometimes, even if they contain just a few files. But of course, I don't want to do ...
18
votes
6answers
33k views

Test if there are files matching a pattern in bash

I am trying to write an if statement in bash to test whether there are any files matching a certain pattern. If there is a text file in a directory it should run a given script. My code currently if ...
5
votes
3answers
538 views

How can I get rid of this invisible file?

Background I have a folder named akorg✽. That Unicode character causes headaches for me when software makes incorrect assumptions about the text encoding of my file paths, so I'd like to remove it ...
5
votes
2answers
24k views

NFS permission denied

When I configure NFS and create a file on the client NFS shared dir, I get the following message: permission denied. My configuration: configuration nfs server ...
0
votes
1answer
227 views

What disk is a file / directory stored on? [duplicate]

From the command line (bash) I would like to know what disk a given file is stored in. E.G.: $ [what filesystem is this file in command] /tmp/example/file /dev/sda1
2
votes
3answers
2k views

Replace filename with parent folder name

I have a bunch of files each in their own subdirectory. I need to write a script to rename each file to have the same name as its directory: For example, given: ./1111/1234.pdf ./2222/2345.pdf ...
19
votes
3answers
3k views

How does touch -t work internally?

How does touch -t command works exactly, internally (I tried to find its source code but couldn't)?
9
votes
2answers
18k views

Move files and delete directories with rsync?

Recently I needed to delete a large number of files (over 1 million) and I read that doing: rsync -av --delete `mktemp -d`/ ~/source && rmdir ~/source Was one of the most optimized ways to ...
1
vote
2answers
174 views

How can find support large files?

I would like to find all the files of my system, which sizes are more than a couple gigabits. I thought I would use find -size, but the man page states: The size does not count indirect blocks ...
0
votes
1answer
564 views

Simple bash script taking too long to execute

I wrote the following function in my .bashrc for use instead of rm * : function re() { cp . -R /home/glset/ritwik/trash/ rm * } It works .. but it is very slow. Even for small files it takes ...
3
votes
2answers
103 views

Test if a file is on NFS?

Is there a simple test to determine if a file is on an NFS mount? (Or maybe more generally, what type of filesystem a file lives on?) I am imagining some ugly prefix matching against fstab...
0
votes
1answer
204 views

Unable to delete a directory even as root

I am unable to delete a directory even as root. The command rm -rf kdyiyv.pif returns nothing. Then I tried the command, touch kdyiyv.pif for which there was an error: touch: setting times of ...
5
votes
2answers
4k views

Disk usage summary per user

Is there a way to get the disk usage per user under a given path? du doesn't seem to have an option to aggregate disk usage per user, and df only seems to report how much disk is left on the drive. ...
2
votes
2answers
491 views

Unable to concatenate files with find ./subdir/* -print0 | sort | xargs -0 cat > merge.txt

I am trying to concatenate thousands of files that result from processing the pieces output by split with find ./subdir/* -print0 | sort | xargs -0 cat > full_merge.txt The files under subdir ...
0
votes
3answers
547 views

What does ./ mean? [duplicate]

I'm having a hard time getting what ./ does. In the Linux Essentials books, it asks me in an exercise to delete a file named -file. After googling, I found that I need to do rm ./-file but I don't ...
7
votes
5answers
3k views

How to split a file by using keyword boundaries

I have a vcf file that contains numerous vcards. When importing the vcf file to outlook it seems to only import the first vcard. Hence I want to split them up. Given that a vcard starts with ...
2
votes
1answer
56 views

Strange changes in files

I have a very strange problem on one of my servers. I'm not sure if it's completely related to linux because it occurs in php and js files. Today I was trying to backup my databases using phpmyadmin. ...
3
votes
2answers
6k views

Linux listing files between two date without touch command

I need a command which will list the files between given date and time (YYYYMMDDHHMMSS - format) in to a text file. I don want to use touch command as its creating permission issue. I am new to this ...
2
votes
4answers
175 views

find command: how to ignore pathname?

I have to find some type of files in a directory and it's subdirectories and I only have to print out the filenames. So here's the main command: find -type f -name "*.c" Now, how could I cut the ...
6
votes
3answers
682 views

Dynamic file content generation: Satisfying a 'file open' by a 'process execution'

I have a read-only file, F. A program, P, that I'm not the author of, needs to read F. I want the content of F to come from another 'generator' program, G, whenever P tries to read F (taking F to ...
0
votes
1answer
50 views

Keyboard shortcut to switch files in one Emacs instance?

I've multiple files opened in an Emacs client. Right now, to toggle between files, I've to click on the file name at the bar below in the editor. Any keyboard shortcuts for switching between files?
20
votes
1answer
669 views

How to move a directory, file by file? (instead of “copy then remove”)

My computer has one 500GB drive. I want to move 400GB of data from /unencrypted to /encrypted. Both directories are on the same partition, but /encrypted is handled by ecryptfs, so mv /uncrypted/* ...
4
votes
5answers
7k views

Find and copy directories containing file type

I have a directory "Movies" containing subdirectories "Movie Name". Each subdirectory "Movie Name" contains a movie file and related image/nfo files etc. I'm trying to copy all directories containing ...
6
votes
1answer
4k views

Keep same file owner for newly created files

This question is regarding samba file access. I have created a folder A, and under folder A created two folders B and C. And also created three users A, B and C. User A has access to all three ...
4
votes
1answer
289 views

Can I create a symlink that will ignore subdirectories?

I'm trying to get dropbox symlinked to the relevant folders in /home. I'd like to symlink them like this: ~/Dropbox/Pictures --> ~/Pictures ~/Dropbox/Camera Uploads --> ~/Pictures/Camera ...
2
votes
1answer
2k views

Getting back rsync's deleted files [duplicate]

I accidentally rsync-ed to a server using the delete attribute when I shouldn't have. Is there any chance of getting the data on the server that rsync removed.. back?
3
votes
3answers
8k views

How to move all files with a certain file extension from subdirectories to a single directory

I have a directory that contains many subdirectories. The subdirectories contain lots of types of files with different file extensions. I want to move (not copy) all the files of one type into a new ...
0
votes
3answers
982 views

Rm command recovery for this situation

İn my desktop, i have a dir. called exam, and i wanted to remove it from the console and wrote rm * /exam, and apparently it removed some other files from my desktop. Please tell me that there is a ...
1
vote
1answer
183 views

Standard I/O File Descriptors

I am new to Shell SCripting I code this $ ls -l 1> stdout.txt and I get the output as desired, 1> stdout.txt redirects the output from standard output to the file stdout.txt. I don't ...
3
votes
2answers
185 views

Search by file dimension [duplicate]

I have many photos. How to search files by its dimensions? For example, i want to search images with exact dimensions 500 x 500 pixels. Is there any utility for this task?
1
vote
2answers
202 views

Single process accessible temporary file

I want to create a file that is only accessible to the process that created it (and potentially its children), and that disappears when the process exits, ideally never persisting the file to disk. As ...
3
votes
2answers
2k 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 ...
0
votes
2answers
822 views

Redirecting stdin with stdout to file

So I have a program that takes in user input and outputs text based on the input. EDIT2: I want to create a script that runs a C executable and the script feeds the C program input from a file and ...
7
votes
2answers
3k 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 ...
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 ...
0
votes
1answer
422 views

LINUX: Permissions for files: Identify if it is a file or directory, and its access allowed to the world, user, and group [duplicate]

I am having trouble understanding permissions for directories and files in LINUX. By examining permissions for each of the following files, identify if it is a file or directory, and describe the ...
6
votes
1answer
179 views

find is missing a result — how is that possible?

What conditions explain this output: root@ip:/# find / -name "server.xml" -print /etc/tomcat7/server.xml root@ip:/# ls /var/lib/tomcat7/conf/server.xml /var/lib/tomcat7/conf/server.xml I am ...
5
votes
3answers
100 views

Replace all the occurences of a term in the files contained in a folder

In a folder on my system, I have a C++ project that I'm trying to compile. This process uses some C++ idioms which are not supported by my compiler version. In particular, often inside the code it is ...
8
votes
4answers
912 views

How do I stop the root user from deleting a file?

I'd like to know if I can prevent the root user from deleting a file. Is it possible?
3
votes
1answer
188 views

Program for identifying files from unfinished torrent-downloads?

Are there any programs that can help identify files and directories belonging to unfinished bittorrent-downloads? I've made a mess, and I'm unsure of which downloads are finished and which are not. ...
2
votes
3answers
297 views

Any programs suitable for making a database over disk-content?

I have quite a lot of external hard-drives, and often have a hard time finding what I'm looking for - not to mention not storing the same file several times on different drives or finding free space ...
3
votes
3answers
208 views

file mass deletion

I would like to delete all the txt, xls,pdf files in a directory as well as its sub directories. I would like to save everything else. find . -type f ! -iname '*.xml$,.png$,.jpeg$,.gif$,' -delete ...
4
votes
2answers
945 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 ...
0
votes
1answer
634 views

Transfer 150GB of files from an old MacBook Pro with Ubuntu 13.04 Live DVD

My girlfriend's old MacBook Pro 2009 (5,4) stopped working. I have tried several times to reinstall OS X, but could not do so. There appears to be something really really wrong with the OS. Since she ...
2
votes
1answer
1k views

“rm -rf Filename.iso ” Permission denied

Hi I am facing an issue while deleting an .iso file from Linux x86_64 GNU/Linux. Here are the permissions for the file: # ls -lrt -rwxrwxr-x 1 dev devgrp 2687934464 Apr 12 14:13 ...
0
votes
1answer
40 views

File inventories and logrotation

I want to collect a huge amount of data files on my actual netapp storage with the command file - f /path... > logfile.txt. Through the huge data amount, the size of the logfile will be critical. ...
1
vote
1answer
38 views

Back up snapshots without being admin

I would like to make a back up/snapshot of a folder where I have built various programs (~4.1 GB in size). The idea is to be able to quickly restore everything in this path to it's original state in ...
0
votes
1answer
197 views

Searching for multiple files and changing file extension [duplicate]

I want to search and identify multiple files, within a directory, having a particular file extension (.txt) and changing the extension to (.fasta). This is considering not changing the file itself, ...
2
votes
1answer
3k views

Download files and create same file structure as the source

I have a config file which consists of list of URIs I want to download. For example, http://xyz.abc.com/Dir1/Dir3/sds.exe http://xyz.abc.com/Dir2/Dir4/jhjs.exe http://xyz.abc.com/Dir1/itr.exe ...