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

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1
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1answer
41 views

Still able to read file after changing permissions

I've made a file as root, and written a string in it. Now I've changed mode to "0" like this: root# ls -al transit/ total 4.0K ---------- 1 root root 6 Jan 5 18:15 27050 root# If I try to tail, ...
0
votes
2answers
48 views

Remove all the contents from /root ( /~ )directory

I wanted a software to be installed and its default directory to install was /root. But the software could not get installed. Now I want to do it again from scratch. But there are some files in /root ...
3
votes
1answer
93 views

Copy only file details (file name, size, time) from remote machine in unix

how can we copy only file details (filename, size, time) from a remote machine in Unix? For example: I have a directory (/opt/apache/…/webapps/Context) placed on a remote machine. Now I want to copy ...
3
votes
3answers
406 views

Determine if a file has been modified

In Linux (currently using ext4 filesystem), how can one check quickly if the contents of a file has been modified without reading any of its contents? Is the stat command a recommended approach? I ...
2
votes
2answers
84 views

Find file, check size and overwrite when filesize is different

Today I found a little bug in my own written CMS. Now I want to rewrite all the files on the server with the same filename. However, I do have some customers with the specific file customized so I ...
1
vote
2answers
62 views

What and Why? - File Descriptors [closed]

What is a file descriptor? Why do we need them?
1
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2answers
46 views

Delete all files by find

How to delete all files found by this command? find -type f -name "*-thumb.png"
1
vote
1answer
50 views

How to check the file type in a script

I want to do a loop for all the images in a directory. The images doesn't have extension so I have to read the first bytes of the image to know its type. The loop should end up being something like. ...
2
votes
3answers
58 views

Pipe files downloaded with wget into a function

I'm downloading a bunch of images with wget and I want to rm the files if they are empty with a function to which I can pass the file. My question is how do I pipe the images to a function like this: ...
1
vote
2answers
61 views

Creating a list of files, removing “duplicates” with different suffix

I have a problem that (I think) require a bit of script-magic - not sure what would be best though... I have one directory with lots pictures in different formats - jpg, gif, png, tiff and svg. Some ...
0
votes
1answer
262 views

How to move completed torrent downloads to another folder without breaking the torrent link?

I'm using Transmission on EOs and I've downloaded a bunch of torrent files which ended up my Download folder in my /home. I'd like now to move the files to my external hard drive without breaking the ...
1
vote
2answers
70 views

Find latest versions of multiple files in multiple directories

I am writing an application and one of the prerequisites is to be able to look at multiple directories and find the latest version of each file. I've had success with ls and find in order to get the ...
2
votes
2answers
216 views

assigning read/write privileges for a folder to a user in CentOS 7

I am logged into a CentOS 7 server as root. I created a folder /somefolder. I want someusername to be able to write to that folder via scp from a remote computer. What command should I run so that ...
2
votes
1answer
108 views

Linux Mint desktop displays different files from ls command

Background I'm running Linux Mint 17 Cinnamon. After a botched attempt at migrating my data to a NAS, I restored my data from an external USB. Problem Statement After restoring from backup, all my ...
5
votes
2answers
63 views

Merging/Combining 2 text files according to numeric field

I have 2 text files file_1: 14595|Age 35|Salary xx|Position ax|2013|Info 1|Info 2|Info 3|Info 4|Info 5 14649|Age 30|Salary xx|Position az|2015|Info 1|Info 2|Info 3|Info 4|Info 5 file_2: ...
1
vote
2answers
37 views

May cp override subdirectories with the same name?

I downloaded an Adobe flash plugin, It includes a .so file and a directory called usr. In this folder, it has sub-folders like bin, lib, lib64, share. In the readme file, it says I need to do the ...
0
votes
1answer
144 views

Create a file using special characters as filename

I have to create such filename, so I can try one pipeline but I am not quite sure how it would happen. So the file's name(s): ;rm *;.jpg (or ;rm -rf *;.jpg). The format of the file doesn't matter, I ...
1
vote
0answers
19 views

run a certain file (e.g. a .py) when a certain image, .wav or excel file get opened [duplicate]

Recently, me and my friend have purchased a Palm Vein Scanner. the goal was using it in a mini-project as a new door lock system. we are connecting it to a Raspberry Pi to run the software on it. ...
2
votes
1answer
160 views

How to count occurrences of all the words in all the files of a directory using grep? But with count incremented only once per word per file

I have already asked a similar question but people misunderstood what i was asking. I was asking how to generate a list of every word with a word count incremented only once per word per file. For ...
2
votes
3answers
55 views

Find command associated with configuration file

Let's say I didn't know what ~/.bashrc is for. Is there a command that would tell me what the file is/does? Other than googling for an answer. The man pages have a files section, maybe there is a way ...
0
votes
3answers
77 views

Number of files in a directory starting with specific text

How to get count of files in a directory starting with specific text like dataxxx.csv
-1
votes
2answers
175 views

delete files having a certain pattern in their names

I want to delete all files that have two numbers and a dot in beginning of their names for example: 01. abc 02. xyz
1
vote
2answers
105 views

How to rename file in bash script one by one

I have loads of files which look like this: data1.csv data2.csv . . data(n).csv My use case is that when I will call my script it will change data1.csv to data.csv and remaining files as it is and ...
1
vote
1answer
31 views

How do I find/list all files on filesystem with a certain SELinux “fcontext”

I'm having trouble finding information on what command, presumably from setools, I should use to find all the files on my filesystem that are labeled by SELinux with a certain file-context (fcontext). ...
6
votes
4answers
207 views

Need to move the last line of the file to second line of the same file

I have a file 'test' in linux with below data. aaaaaa bbbbbb cccccc dddddd eeeeee I need to cut the last line of this file and put it in the second position. It must look like below. aaaaaa eeeeee ...
0
votes
1answer
93 views

Split the large files into sub files. How to do this process? [duplicate]

I have a large file in my unix box with 2 Gb. The files contains the xml lines. I want to split the files into say 10 files say each file is now of 204 MB ( approx ) so that combining the 10 files ...
2
votes
2answers
91 views

Check files for conventions

I need a script that checks and lists all text files for project conventions. With conventions I mean for example: UTF-8 encoding No trailing white spaces Newline at the end of file No not-ascii ...
6
votes
6answers
1k views

How can one run a program installed in one machine from another machine?

Is it possible to have, say, one machine with software installed and call that software from another machine? I thought this would be called an "application server" but by googling I find things that ...
1
vote
1answer
82 views

How to give permission to group to read/edit unowned files on archlinux?

I'd like to be able to read files from external hdd or other partitions without having to su root every time or chmod the whole partition to myself/group. How can I give myself/group permission to ...
2
votes
2answers
188 views

Deleting files older than a month [duplicate]

Need to delete all sub-directories which are a month old. But last day of the month data should be ignored for previous three months. The data representation is as follows: bkp_01102014 ...
0
votes
0answers
60 views

How to compare file sizes in two directories?

I have copied some files to an SFTP-only server. I want to verify that all the files arrived intact. Since the server is SFTP-only, I cannot run e.g., an MD5sum on the remote host. I have the server ...
1
vote
2answers
79 views

Convert a hardlink into a symbolic link

It is easy to convert a symlink into a hardlink with ln -f (example) It would also be easy to convert a hardlink (filenames link and original) back to a symbolic link to link->original in the case ...
2
votes
1answer
42 views

Remove created file after x minutes

I have a directory /my/path/tmpimages. Whenever a file is copied/created there, add a timer that remove that file after x minutes. What I found is that I need to use inoticoming or incrond to watch ...
0
votes
5answers
60 views

Is there a way to do a “full file buffering” inside a chain of piped commands?

Very often I do simple operations on a file, for example: cat file1.txt|sed -r 's/^ *//' to remove spaces at the beginning of the line. If I want to overwrite the file, the only way I know is: cat ...
1
vote
0answers
29 views

How can I set a group policy to all access on all folders except one?

I am currently making a test environment where users will be going through a network administration course with different levels they must complete. Due to the nature of the course, we want to give ...
2
votes
3answers
122 views

Is it possible to detect when a file has been downloaded?

We have a server where another script sFTPs and downloads files everyday. Question: Is it possible to detect that the file was downloaded and then for me to automatically archive the file after they ...
-1
votes
2answers
72 views

How to find a file on Windows in linux using the terminal

I have a .java file in Windows that I need to access in linux because it is a requirement of a homework project of mine to submit it to the school's linux server. In the past, I've copied and pasted ...
1
vote
1answer
77 views

batch-rename all config file endings to conform to apache 2.4

since apache 2.4 all files in /etc/apache2/sites-available and sites-enabled have to be named with the ending .conf Now on my server I have a lot of these files, renaming the files in sites-available ...
0
votes
2answers
56 views

Change file hard link count

On my Linux machine, I have the following file: drwxr-xr-x 2 jsgdr Unix_31 4096 Dec 2 17:46 jsgdr How to change the permission 2 to 4 so that I will this: drwxr-xr-x 4 jsgdr ...
1
vote
1answer
45 views

Dynamic ~/.ssh/config

I'd like make my ~/.ssh/config file dynamically generated by a shell script (or anything else that prints to STDOUT). Is there a UNIX trick to make reading a file result in executing a command & ...
1
vote
0answers
53 views

Unable to access a directory despite belonging to a group with write permission [duplicate]

I am learning basic file permission in Linux and tried actions below. I have a folder "music" to which group "music" has wxr permission. I have user "finxxi" added into group "music". When user ...
0
votes
2answers
90 views

linux + find command with rm -rf

why the following command removed the tmp directory under /var and how to avoid this? find /var/tmp -type d -ctime -1 -exec rm -rf {} \; pwd /var/tmp [root@linux /var/tmp]# find /var/tmp -type ...
1
vote
3answers
87 views

Remove old directories according to directory's name?

In my bash script I create a directory each month for backups as follows: DAY=$(date -d "$D" '+%d') MONTH=$(date -d "$D" '+%m') YEAR=$(date -d "$D" '+%Y') mkdir -p /var/app/backup/$DAY$MONTH$YEAR ...
3
votes
2answers
372 views

Append timestamp of last edit to filename

I would like to add the time of the last change to the file to its filename using the bash. For example this output of ls -la: -rw-rw-r-- 1 beginner beginner 5382 Dec 1 17:18 B_F1-1.xml should ...
2
votes
2answers
47 views

Command to work on all files in a folder and output result to single file

I have a list of files, 10 to be exact, in a recipe folder. I must determine the number of occurences of each word in all the files and then order them according to these frequencies. I can get my ...
1
vote
2answers
43 views

Why doesn't my regex work in bash “if”? [duplicate]

Here is my code: if [ -f /Applications/xml[0-9].pl ] I also tried with -f =~ and double brackets but none seem to work. I first though that the regex might be faulty but I tried this. echo h1 | ...
5
votes
1answer
156 views

How to make a list generated by md5deep in alphabetical order of relative paths?

If I want make a md5sum list recursively, then I would use md5deep, but it starts to pop up some problems such as it won't generate the md5sum file in alphabetical order. For example, $ cd ...
1
vote
1answer
300 views

Shell script check if file exists?

I wrote a simple backup script which back ups my stuff on a remote server, everything is working great but I'd like to have some sort of report like "backup successful or not". this is my script # ...
1
vote
2answers
60 views

Map reading/writing a file to getting output from/sending input to a script?

Suppose I have two scripts, script1.sh and script2.sh. I am wondering if there is a way to make a filesystem interface such that, for example, I can go vim file and then have my system run script1.sh ...
2
votes
3answers
92 views

Find files that have a confirmed duplicate in same directory recursively

Say I have the following directory structure: root |-- dirA |-- file.jpg |-- file-001.jpg <-- dup |-- file2.jpg |-- file3.jpg |-- dirB |-- fileA.jpg |-- ...