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

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0
votes
0answers
9 views

Can't delete files using SSHFS on windows

My problem is that i can't delete any fails from any folder using my windows sshfs client. Even though i'm logging in through root account, it still says that i do not have enough permission to ...
78
votes
17answers
24k views

Is there an easy way to replace duplicate files with hardlinks?

I'm looking for an easy way (a command or series of commands, probably involving find) to find duplicate files in two directories, and replace the files in one directory with hardlinks of the files in ...
26
votes
1answer
3k views

Why does the following bash script delete itself?

If you create an executable file with the following contents, and run it, it will delete itself. How does this work? #!/bin/rm
2
votes
1answer
47 views

How to delete files with ~?

I have removed all my python code from the home directory, but when I do ls I get: a11.py~ class1.pdf foobar.txt~ n1 pic.py~ When I do ls like this: ls *.py I get: ls: cannot access *.py: No ...
2
votes
3answers
60 views

Display files to size with lower and upper bound without using `find`

I need to create a program via vim in Linux called between. The script takes two arguments as the lower bound and upper bound of the file size, and prints out a list of file names as well as their ...
12
votes
4answers
556 views

dd: multiple input files

I need to concatenate chunks from two files: if I needed concatenate whole files, I could simply do cat file1 file2 > output But I need to skip first 1MB from the first file, and I only want ...
11
votes
5answers
9k 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 ...
0
votes
2answers
15 views

How can I give files extended attributes in mac os x?

How can I give files extended attributes in mac os x? Mac os x doesn't have the 'setattr' command.
0
votes
0answers
9 views

Qubes/Xen OS: access file manager for dom0

I hope somebody more experienced with Qubes specific terminal commands can help. If the KDE manager is installed, how does one open via terminal input the file manager for 'dom0'? To browse 'Home' ...
2
votes
2answers
847 views

how to find out the full path of the command from the result of lsof -i

lsof is a great utility, just now started using it. lsof -i | grep smtp => this give the following result. httpd.pl 212548 global 3u IPv4 893092369 0t0 TCP ...
1
vote
1answer
782 views

Apache created files and its permissions for CentOS 6.x

In short, I have an authenticated HTTP-POST that: posts a jpg image (created as 666 apache:www) into /directory1 (777 ftpuser:www) creates /directory2 (created as 666 apache:www) in a 777 ...
2
votes
3answers
37 views

Is there a way to see the dimensions of a jpeg file in linux using the command line?

I have some .jpeg images saved in a file in a cluster at school. I am at home using PuTTY to access one of the Debian nodes. I'm able to get to the folder with all the images but I need to see the ...
0
votes
0answers
19 views

Where is my 7za data being written to

I have a weird question about 7za on Centos 7. I am adding a file to a 7za archive using the following command (the total size of the directory is around 40GB) /usr/bin/7za a -ppassword -t7z -mmt=off ...
0
votes
0answers
16 views

Problem in writing to a File after Power on/off? [on hold]

I am writing the content of my script to a .log file using > operator. I am doing it on a Raspberry Pi. After a Power on/off if I try to execute the script it doesn't write to the file. I then ...
1
vote
2answers
33 views

Are all files outside of /home/userabc owned by root?

I'm writing a tar implementation for a package manager, and I wonder if I can skip the permission setting of the user in the tar headers and keep what is there by default, the user who wrote the ...
0
votes
2answers
38 views

How to see information inside inode data structure

I can do an ls -li to see a file's inode number, but how can I list information inside a particular inode by using that inode number.
0
votes
3answers
19 views

How to apply dos2unix recursively to all the contents of a folder?

Is there a way to apply the dos2unix command so that it runs against all of the files in a folder and it's subfolders? man dos2unix doesn't show any -r or similar options that would make this ...
54
votes
5answers
30k views

Find duplicate files

Is it possible to find duplicate files on my disk which are bit to bit identical but have different file-names?
3
votes
2answers
1k 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 ...
0
votes
0answers
12 views

Import Windows file into Linux Ubuntu VM [duplicate]

I have a Ubuntu/Gnome VM using Virtual box installed on an external usb drive. I have been emailed a ubuntu script recorded session from another user to my Windows PC. I want to be able to import ...
0
votes
1answer
248 views

Ambigous redirect done >$2

I have finished my bash script but I am still getting two errors. I've also searched for related issues but none worked: #!/bin/bash avem_element () { local e for e in "${@:2}"; do [[ "$e" == ...
0
votes
1answer
115 views

How to fix ntfs file problem when there is now windows?

I have a "stubborn" file on an NTFS partition which refuses to be deleted. A little background on the problem... Problem happened when I was running Zim on my Linux and the system froze due to some ...
0
votes
0answers
96 views

Google Drive HTTP Error when downloading .zip file with Firefox

I'm using openSUSE 42.1 and opened a fresh install of Firefox, but somehow when I try to download a zip file from my Google Drive, an error is shown: Could not download "[filename]". HTTP error. ...
0
votes
1answer
34 views

How “Max open files” soft and hard limit are set for specific process?

I used the cat /proc/<pid>/limits command to check the Max open file hard and soft limit, but I want to know how this value will be set and can it be increased or decreased? Is this value is ...
7
votes
2answers
625 views

Zip Archive With Limited Number of Files

What command can I use to create zips with a file number limit? I have a folder (no subfolders) of, say, 5000 files, so I would want a command that could divide that number and create 10 individual ...
-1
votes
1answer
20 views

adding date to beginning of file name using script

I have multiple files that need to be renamed with a date added to the beginning of the file name that I am trying to script. I'm using the cp command because I need to keep the original file I need ...
1
vote
2answers
44 views

Why does SCP fail when “RequestTTY force” option is enabled?

In my SSH config file, I have to enable the RequestTTY force for some important reasons. And currently my config file looks like this: Host x.x.x.x HostName yyyy StrictHostKeyChecking no ...
6
votes
2answers
10k views

What is nobody user and group?

On my server (Synology DS212) some files and folders have nobody nobody users and groups. What are the characteristics of this user and group? Who can write of read this file? How can I change it ? ...
5
votes
1answer
19 views

Clear recent open file history on Linux Mint

Sometimes others in my household briefly use my computer, when they do I sometimes don't want them to see my file history. I know how to prevent Bash from writing entries to the ~/.bash_history file ...
5
votes
4answers
7k views

Constantly check if file is modified bash

I have a file called file1 I want in a script, whenever there is a change in it, do something, a beep sound actually. How do I do that ¿? Thank you in advance
1
vote
0answers
47 views

how to limit file manager access based on users on Ajenti

I installed Ajenti-v on my ubuntu server 15.10 and I want to create multiple users with specific access to their home directory. currently, whenever I create a new ajenti user (which is synced with ...
73
votes
2answers
111k views

Empty the contents of a file

I am aware of three methods to delete all entries from a file. They are >filename touch filename filename < /dev/null Of these three I abuse >filename the most as that requires the ...
4
votes
1answer
43 views

File permissions on Linux?

I am surprised that /mnt, /media or even /opt are not writable by myself on my own system (Linux-Ubuntu). Should I always use sudo for any action on these paths? Or would it be better to add myself ...
1
vote
2answers
36 views

How to apply an awk script to multiple files in one folder using a loop

I am trying to apply one awk script to all the files in one folder, I am using: for %%i in (*.txt) do (awk -f NormalizeFiles.awk "%%i" > new\"%%i") but then I get the message: Syntactic error ...
3
votes
3answers
93 views

How can I test if a file in /root exists without su to root?

My OS is Ubuntu 14.04 LTS. I got a file /root/1.txt, and logged in with 'yu', who doesn't have read permission on this file. When I use the code if [ -e /root/1.txt ] , it returns false. I know I can ...
3
votes
2answers
63 views

Changing a file's modified date based on date in file name

I have a directory full of photos with file names in this format: IMG-20160305-WA0001.jpg. The date taken is obviously in the file title. Unfortunately the date modified on all files is today. I ...
36
votes
8answers
51k views

How do I grep recursively through .gz files?

I am using a script to regularly download my gmail messages that compresses the raw .eml into .gz files. The script creates a folder for each day, and then compresses every message into its own file. ...
1
vote
0answers
29 views

Deleted file being written to by running process, can I recreate it? [duplicate]

I've started a long running process with nohup and redirected it's output to a log file Example: nohup ./bin/zkServer.sh start-foreground > /usr/local/myuser/logs/zkout.log 2>&1 & I ...
5
votes
2answers
22k views

Display a file's history (list of users that have modified a file)

Is there a command to display a list of users who modified a file providing a file history? I know that possible with svn/git etc.. but we have a config file that is not in SVN and someone modified ...
1
vote
1answer
24 views

How to clear data from all files present in a directory?

I have a folder which has some text files and other folders in it which in turn have more text files in them. I need a command which will recursively loop over the folder and clear all the contents ...
4
votes
1answer
27 views

Document Management System for Linux

So I got a problem and I hope someone knows the answer. Basically I am looking for a DMS (document management system) for my music and movies. I have a huge amount of files, currently in folders but ...
4
votes
3answers
347 views

What's the quickest way to find duplicated files? [duplicate]

I found this command used to find duplicated files but it was quite long and made me confused. For example, If i remove -printf "%s\n", nothing came out. Why was that? Besides, why they used xargs ...
1
vote
3answers
370 views

Copy content from files X and Y to create file XY but XY content is all lowercase

What's the right command to copy the content from file X and File Y to create a new File XY with all letters being lowercase?
21
votes
3answers
14k views

Determining if a file is a hard link or symbolic link?

I'm creating a shell script that would take a filename/path to a file and determine if the file is a symbolic link or a hard link. The only thing is, I don't know how to see if they are a hard link. ...
-1
votes
0answers
33 views

I busted my ssl.conf file and when I do a recovery I can't overwrite the file with new settings

So, I thought I would be super smart and figure out how to disable the older SSL v2 and v3 on the web server. Turns out I messed something up. So, I tried to open the file and then make the changes, ...
13
votes
5answers
42k views

How do I append text to the beginning and end of multiple text files in Bash?

I have a directory full of text files. My goal is to append text to the beginning and end of all of them. The text that goes at the beginning and end is the same for each file. Based on code I got ...
10
votes
5answers
16k views

How to remove blank lines from a file in shell?

I want to remove all empty lines from a file. Even if the line contains spaces or tabs it should also be removed.
1
vote
2answers
600 views

How use minimum number of commands to copy all .txt files from all subdirectories to one directory?

I have more than 90 subdirectories and inside each one, there will be a number of .txt files. What I need to do is to copy all those txt files out to one single directory. How can I do that?
0
votes
1answer
12 views

linux + sysctl.conf configuration

Is it right to comment line with # in the file sysctl.conf? I ask because I am not sure if the comment lines would be read or not. more /etc/sysctl.conf #net.core.rmem_default = 1048576 ...
13
votes
6answers
48k views

Add lines to the beginning and end of the huge file

I have the scenario where lines to be added on begining and end of the huge files. I have tried as shown below. for the first line: sed -i '1i\'"$FirstLine" $Filename for the last line: sed -i ...