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

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5
votes
3answers
388 views

Why does this executable still execute after I deleted it?

I deleted the executable, so why is it still running? root@raspberrypi:/test# ls -la total 11096 drwxrwxrwx 2 pi pi 4096 Mar 12 18:26 . drwxrwxr-x 11 pi pi 4096 Feb 28 13:50 .. -rwxrw-rw- 1 ...
1
vote
0answers
55 views

Changing file time using touch

Im trying to change the file time of a m#merge the files to a temporary file. mergecap -w "${dir_dcn}"/merge_dcn.pcap "${FILES_dcn[@]}" touch -r "${FILES_dcn[14]}" dcn_file ls -l dcn_file ...
2
votes
2answers
52 views

How to list all the files which were not created on Thursday

I need to delete old backups but I only want to keep Thursday Backups and delete the rest of the backups. Give me some kungfu tips. I'm on RHEL if that makes a difference.
2
votes
1answer
116 views

How to copy files *to* a camera?

I'd like to copy a firmware update file to my Canon 7D camera. After it was auto-mounted by thunar + thunar-volman + gvfs-gphoto2 I tried the following: $ cp eos7d-v205-win/7D000205.FIR ...
2
votes
2answers
99 views

Tool to show PID and file I/O in realtime

I need to watch a program which modifies some files. I don't know which files the process is modifying_. So I'm looking for a tool that basically outputs a PID, and lista the files being ...
2
votes
4answers
80 views

Wrapper command that runs program in temporary directory and deletes it after execution [duplicate]

I want to write a command that: takes another command as its arguments does a 'cd' to a temporary folder executes the command passed in the arguments removes the temporary folder afterwards ...
4
votes
1answer
790 views

Changing a file's “Date Created” and “Last Modified” attributes to another file's

I'm using merge cap to create a merge pcap file from 15 files. For the merged file, I have changed the name to that of the first of the 15 files. But I would also like to change the merged file's ...
2
votes
2answers
49 views

How to tell which files have been created by an application?

I want to find out what files an application has created or modified. In the old days it was easy. cc foo.c created a.out, cc -o foo foo.c created foo, cc -c foo.x created foo.o. Now applications ...
3
votes
4answers
140 views

Removing file which doesn't have any permissions and attributes

I have a file on my external hard disk named ._Icon^M.I ended up with this after using my hard disk on old Mac platform machine. I want to delete this file but unable to. For the command 'ls -al' it ...
9
votes
2answers
1k views

Fastest way to concatenate files

I've got 10k+ files totaling over 20GB that I need to concatenate into one file. Is there a faster way than cat input_file* >> out ? The preferred way would be a bash command, Python is ...
1
vote
2answers
171 views

Free disk space from a JBoss log file which is still being written to

Is there any locking on the content, imposed by the process if at all the process is using the file. We host a JBoss app server on a RHEL 6.4 OS and due to the disk space constraints we have decided ...
3
votes
4answers
147 views

How to get folder size ignoring hard links?

I use rsnapshot for backups, which generates a series of folders containing files of the same name. Some of the files are hard linked, while others are separate. For instance, hourly.1/file1 and ...
3
votes
3answers
80 views

Why are file handles a scarce resource?

I feel like every tutorial I read on resource management in server settings starts by asserting that file handles are a scarce resource, and we should therefore aim to keep the list of open files to a ...
1
vote
6answers
407 views

Program a file to self-destruct at a given time

Does anyone know whether there is a command in linux that can set attributes to file so that the file can disappear after certain time. For example, if I set one attribute to file as "1/1/2015", so ...
3
votes
3answers
245 views

Transform a directory into file or a file into directory

I wanted to create a file named test. Accidentally I run mkdir test instead of touch test. Is it possible to convert test directory in a file named test? What about converting a file named test into ...
2
votes
2answers
30 views

Search for files by content only in trunk subdirectories

I think its a simple question, but the answer is probably a little more complicated :P Edit: Actually, its not complicated at all!^^ So I have a directory with multiple svn projects and I would like ...
0
votes
0answers
184 views

NFSv4 which “domain” to put in idmapd.conf?

I'm using NFSv4 but suddenly when the NFS Server got rebooted, all the files on the Clients are having nobody ownerships after the Server is booted and started its whatever services again. Then I ...
0
votes
0answers
15 views

Net-SNMP Application

I don't know if this is the right place to ask this question, but, does anyone knows about Net-SNMP. Is it possible to not truncate the log file whenever snmptrapd is restarted? The logs are being ...
0
votes
2answers
91 views

Make file in linux readonly

Is there a way to make a file readonly permanently in linux. Or can I put a password to a file to make it readonly, then apply that password again to change its permission, or before they can alter ...
0
votes
1answer
46 views

Capture Error of LS to file [duplicate]

#!/bin/sh if [ $(ls sample01.log | wc -l) = 1 ] then echo "File Found" > lsOutput.log else echo "File Not Found" > lsOutput.log fi But if sample01.log is not already existing my code already ...
0
votes
1answer
184 views

LS Command output to file [closed]

I want to capture to a file the output of the ls command ls >> lsOutput.log This one works if executed in the command line. But when put inside a shell script (lsOutput.sh), returns ...
4
votes
1answer
107 views

measure amount of data read from /dev/random

background I have written a collection of bash scripts (most of them in German only yet but if you are interested; download the archive not the single scripts) which help users create high-quality ...
-1
votes
1answer
52 views

What is a file? [closed]

I thought that the file is a reserved place on disk and it is a Record collection but i found that it is a wrong definition because the empty file capacity is 0kb so it can't be a reserved place on ...
4
votes
1answer
88 views

Is there a way to cat files as they are created? [duplicate]

Unlike the answer to this question (Can a bash script be hooked to a file?) I want to be able to see content of files that haven't been created yet as or after they are created. I don't know when ...
1
vote
0answers
53 views

NAS device failed and I am attempting to get data back - HELP! [closed]

Not a Linux guy!~ Tried on windows pc and failed. Put the Nas device hard drive is in an older pc with Kali in forensic mode because device failed and all no longer allowed access to data on hard ...
2
votes
2answers
393 views

How can I restore file timestamps of video recordings using the embedded metadata?

I'm looking for a command that will read the metadata of a ‘*.mp4’ file and touch the file's timestamp with the creation time of the video. The command should be read-only with respect to the file ...
6
votes
3answers
376 views

Is there a file for each socket?

"Everything is a file" in the UNIX World. Above sentence is famous. When I run echo "hello programmer" >> /dev/tty1 , I can watch the given string on TeleType 1 , .... What and where is file ...
2
votes
1answer
227 views

Copy files based on date/time from subset of directories

I'm teaching a class where (~80) students are submitting assignments that I can access via webdav, organized by student in directories named by their unique identifier. The students are split into ...
2
votes
2answers
93 views

How to change “date modified” of multiple folders, to be the same of that of a .mkv that's inside each one, using Cygwin

How to change "date modified" of multiple folders to be the same of that of the .mkv that's inside each one. eg. there's folder1 which contains a file 1.mkv folder1: 2/17/14 1.mkv: 1/6/12 I want ...
4
votes
3answers
233 views

granting write permissions to a group to a folder

How can I grant write permission to 1 group ? I have 2 users (alex and ben). alex is member of group alex and of group consult. ben is member of group ben and of group consult. I want to grant read ...
2
votes
2answers
502 views

delete old log files except the last one (alphanumerically sorted)

I have a number of log files in the form: log.2014-02-19-10_24_22 I.e. log.YYYY-MM-DD-H24_MI_SS The date that's part of the log file's name is when the log file was first created. So at any given ...
1
vote
4answers
313 views

move file by list in file

I have a file the contain filenames, for example: /tmp/list.txt (it is with the spaces at the start of each line): /tmp/file.log /app/nir/home.txt /etc/config.cust I want, using one line, ...
4
votes
2answers
120 views

How to delete a directory automatically when an executable is killed

Quite often we run an executable that needs to write / read some temporary files. We usually create a temporary directory, run the executable there, and delete the directory when the script is done. ...
5
votes
1answer
330 views

Cannot delete broken symbolic link

I have a symbolic link formerly pointing to a Dropbox directory. I don't know what I did wrong, but apparently now it points to itself. hyper@mypi:/home/hyper/test$ ls -l total 1024 lrwxrwxrwx 1 ...
2
votes
1answer
39 views

Ignore file changes

I have a process, which generates a file with configuration data and then calls a subprocess with this data as parameter. I'd like to override the configuration data, which is passed. The problem is, ...
3
votes
0answers
64 views

How does fsnotify setting affect system performance?

Occasionally a software package I install complains that the default fsnotify setting is far too low for decent performance. Intellij IDEA or crashplan are two examples. They suggest using fsnotify ...
1
vote
1answer
2k views

How do I set Nautilus as default file manager in Elementary OS

Elementary OS uses a program called files as the default file manager. I would like to use Nautilus as my default file manager as used in Ubuntu 12.04 . I have GNOME Nautilus 3.4.2 installed on my ...
3
votes
1answer
495 views

File inheriting permission of directory it is copied in?

I have files created into my home directory with only user read permission (r-- --- ---). I want to copy this file to another directory /etc/test/ which has the folder permission of 744 (rwx r-- r--). ...
3
votes
2answers
281 views

Wait for move directory to be completed before attempting to delete it

I have a process running on one computer that spawns simulations by writing the simulation data to directory pre/id. Worker processes then copy a simulation from pre to a local disk, which can be on a ...
0
votes
1answer
57 views

Is it possible to add granular permissions on a folder without installing acl?

I have a folder public_html with several subfolders on Ubuntu 12.04 server. Is it possible to add different permissions on individual subfolders for two new individual users without changing the ...
4
votes
2answers
274 views

How to know if a text file is a subset of another

I am trying to find a way to predict if a text file is a subset of another.. For example: foo bar is a subset of foo bar pluto While: foo pluto and foo bar are not one a subset of each ...
3
votes
1answer
77 views

Better way to kill all processes with a handle to some file

This kills every process with a handle to file /foo/bar (in bash): lsof /foo/bar 2>&1 | grep "/foo/bar" | sed "s/ */\\t/g" | cut -f 2 | while read PID; do kill $PID; done This does not ...
-1
votes
1answer
57 views

Importing an excerpt from a file into a script

I'm trying to import an excerpt from a file into a script for processing. LIST=$(sed '1,/+++NETWORKLIST+++/d' < /path/to/file | sort -t ";" -k2,2r) My problem is that this script is not deleting ...
1
vote
1answer
96 views

ls: show file size with thousand separator [duplicate]

Is there some simple way to make ls display the file size number with thousand (and million, billion, ...) separator? A sample output should look like this: $ ls -lAF /bin/ -rwxr-xr-x 1 root root ...
0
votes
0answers
193 views

ETL testing - Unix Commands

As part of etl testing I need to find record count for each different record. Currently we are having some 8 different record types in the flat file. Is there any unix command to find the record ...
0
votes
1answer
16 views

Relocate file into subdirectory

I'm bit new to Unix. Please help with below question though it may sound very simple. How to relocate file1 into subdirectory dir1?
2
votes
1answer
94 views

Compressing all files that contain a particular string

How can you compress all files in a directory that contain the word “compress” anywhere within its contents?
3
votes
3answers
301 views

Which command to use to find all files/folders with non-default permissions?

Suppose I have a folder, containing other files and folders, and I'd like to find out recursively which subfiles and subfolders have non-default permissions (i.e., not 644 or 755). Which command can ...
2
votes
3answers
55 views

How to get a list of applications associated with a file using command line

File associations usually are made in the desktop environment, but how to get a list of applications associated with a file using command line? Something like: $ getassoc foo.pdf <CR> $ ...
1
vote
1answer
73 views

brasero.toc.bin is very big — why?

I have a file in my home directory: brasero.toc.bin, which ls gives as: -rw-rw-r--. 1 Harry Harry 633M 2013-09-26 15:53 brasero.toc.bin in fact it is the second largest file listed, only sdc at ...