Logical entities that contain data in a filesystem. Use this tag if your question: is about programs that create files (e.g. gzip, tar, zip); deals with characteristics of files (permissions, size, path/location); or is about management of files (renaming, listing, moving, removing). For operating ...

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51
votes
8answers
126k views

How to list all files ordered by size

I would like to list all files in the order of big to small in size and the files could be present anywhere in a certain folder.
0
votes
0answers
41 views

SFTP compression vs gzip when sending decent number of files

I have a directory that's got a few gigabytes composed of several ten thousands small files. I want to copy them over the network using SFTP. Initial research has proven that compression will reduce ...
1
vote
0answers
67 views

Copying files to a directory shared via ACL doesn't get default mask

I'm trying to setup a simple shared directory on an ext4 filesystem for a group of users to work on. Let's say I just need to give all permissions to all users belonging to the group "workgroup" to ...
-2
votes
6answers
4k views

Wildcards: how do I list files ending in `.txt` only without using the dot character? [closed]

I have a directory with nine files in it. 1 ending in .bat 2 ending in .bak 4 ending in .txt 2 ending in .xtxt My question is, how do i list only the files ending in .txt, but without using the ...
1
vote
0answers
21 views

Removing dirs with lots of tiny files on Lustre

I have a dir with a gigantic amount of very small files that I want to remove and simply removing the dir with "rm -rf /path/to/the/dir" is already taking multiple days. It might sound strange that ...
2
votes
2answers
126 views

Multiplying numbers in-place in a file

I have ASCII file contain numbers as follow: 1 2 3 5 6 9 7 8 9 . . . . . . . . . . . . . . . etc I want to upgrade this file by multiplying each value by "3" to get : 3 6 9 15 18 27 21 24 27 ...
8
votes
8answers
12k views

What's the best way to count the number of files in a directory?

If parsing the output of ls is dangerous because it can break on some funky characters (spaces, \n, ... ), what's the best way to know the number of files in a directory? I usualy rely on find to ...
0
votes
1answer
34 views

Bulk file rename with a list of rules

Is there a way to rename multiple files, using some template written for example in the txt file? I need to replace some specific words with some other words in the bunch of files. I've got, say 1000+ ...
5
votes
2answers
4k 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 ...
2
votes
2answers
1k views

Postfix no longer logs to /var/log/mail after it has been deleted and re-created?

I accidentally deleted the /var/log/mail file. Until that point I was able to monitor it using postfix stuff. Now, it seems that Postfix doesn't send its logs to /var/log/mail, since the file is not ...
1
vote
0answers
20 views

Is there any way I can track down what is removing the executable flag from a file?

I have a set of git hooks that constantly have their executable flag removed. I'm utterly at a loss for what might be doing it, but so far the only thing I've found that can even mitigate the problem ...
1
vote
2answers
34 views

How can I log how often a file is modified on OS X?

I would like to know which files in my system I access most often, as a gauge of how important they are. I know the OS records the last time the file was accessed. Is there someone way to log in a ...
0
votes
1answer
40 views

List files before a specific date in bash [closed]

How to list files before a specific date in bash?
1
vote
3answers
65 views

How to delete unknown file that doesn't have proper permissions

My co-worker sent me a theme in a tar.gz file and I tried unzipping it using the archive manager GUI as I usually do for any kind of zipped file. However, it produced a corrupt file/directory that I ...
5
votes
3answers
987 views

How to view last 5 lines from last created/modified file?

Every day I have to take backup and update the status to support teams at particular time for which I need to check last 5 lines of last created/modified *.aff file in a directory and update them. ...
1
vote
1answer
25 views

On the fly compression of read- and writeable folder (like Windows EFS)?

Is there a possibility to compress the contents of a directory in Unix (especially AIX) on the fly, while still being able to read and write in the directory? Like the Windows EFS encryption does?
1
vote
1answer
39 views

sh script containing perl element does not produce same output via crontab as manual execution

I tried posting this on Stackexchange but I think I may have more chance of a correct answer here as its very linux specific. I have an sh script which updates data in a csv, then runs a perl script (...
0
votes
1answer
30 views

How to use 7z and “for file” with multiple file inputs?

I have multiple files in a folder like: 1.txt 2.txt 3.txt ... 100.txt And I want to use 7z to compress single files, generating 1.7z, 2.7z 3.7z... I'm trying to use for file in {1..100} ./{1..100}....
2
votes
2answers
85 views

search contents of files that are packed in a zip file

For my school project i have to create a script that allows you to search the contents of files that are packed in a zip file. You can give a "search string" with the script, followed by one or more ...
2
votes
1answer
37 views

Recursive move (`mv -rn`, like `cp -rn`), a move that will only move not present files

Context I have user uploaded content that needs to be backed up. The content is over 3 separate servers at /var/www/domain/media/ (on each server it is in the same place). The backup is a NFS ...
2
votes
1answer
38 views

Can directories and file inherit same permissions as parent directory?

I want all directories and files to inherit same permissions as parent directory.
1
vote
1answer
27 views

Disable OS-level caching

I want to be able to prevent the OS from caching in memory either: A particular file, or Any file a particular process accesses (i.e. by specifying a pid) Either would be helpful since I don't ...
1
vote
1answer
24 views

Extract creation date and modification time of file in Sunos [duplicate]

I want to extract creation date of a file and modification time. The format should be( yyyymmddhh24miss) My unix shell /usr/bin/ksh The file: file.txt My system: SunOS 5.10 Generic_150400-23 sun4v ...
1
vote
2answers
975 views

How to give sftp access to sub-directory only not to parent

I want to give SFTP access to user tom for directory /var/www/html/my_project/. while I don't want to give any SFTP access to directory /var/www/html/. currently /var/www/html/my_project/ and /var/...
0
votes
1answer
37 views

Explain the output of realpath [closed]

I am trying to use the command line to return the absolute path to a file. I read that there are multiple ways to go about this, namely the realpath, readpath -f, and locate commands. None of these ...
3
votes
3answers
38 views

Differentiate betwen ELFves and scripts fast

How do I use file to differentiate between ELFves and scripts as fast as possible? I don't need any further details, just ELF, script (/plaintext), or other/error.
1
vote
0answers
36 views

Delete all the files which has only one line [duplicate]

I have a directory which contains about 9,000 files. I want to delete those files which have only one line. My command is: wc -l * | grep '^ 1 ' | awk '{$1=""; print $0}' | xargs -0 rm ...
2
votes
1answer
35 views

How to store endless stream to file?

Let's have any stream of binary data (like /dev/random, /dev/zero, etc.). Let's have a file which size can be N at maximum. Let's the N is in order of gigabytes. Is there any elegant method/...
1
vote
1answer
28 views

Is it possible to pipe into dirsplit?

I'm trying to figure out the "Linux way" of accomplishing the following task. I have a directory with a bunch of sub-directories, each of which contain multiple files of various filetypes. I can ...
3
votes
2answers
1k 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 server07.host...blah.....
2
votes
4answers
53 views

How to delete all duplicate hardlinks to a file?

I've got a directory tree created by rsnapshot, which contains multiple snapshots of the same directory structure with all identical files replaced by hardlinks. I would like to delete all those ...
1
vote
1answer
858 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 ftpuser:...
4
votes
2answers
66 views

Rename Multiple files gzips them and delete older than 10 days

I'm new to Linux/Unix and slowly learning it step by step. Unfortunately on today’s job interview was surprised by a task to do (which of course I didn’t know). I was asked to prepare a bash script ...
2
votes
3answers
11k views

How can I move a file to another user's directory?

I'm using CentOS 6 and I'm trying to move a file from USER A to USER B but I keep getting permission denied. What do I need to edit to allow to me to put files from one user's directory into another'...
5
votes
0answers
48 views

Why group-writable file works “unidirectionally”?

Users vi and rust share group rust and want to use some file in shared manner. rust$ ls -l myfile -rw-rw-r-- 1 vi rust 0 May 30 03:48 myfile rust$ stat myfile | grep Gid Access: (0664/-rw-rw-r--) ...
2
votes
1answer
48 views

Stop user from deleting file in directory

This is the scenario There is one directory /test which is owned by oracle.dba I created new user TEST who will have permission to create NEW files but it should not be able to delete the files he/...
25
votes
4answers
17k 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 ...
2
votes
2answers
44 views

Incorrect permissions on special files

I've noticed a lot of special files on Linux have what appears to be incorrect permissions: E.g.: $ ls -l /dev/fuse crw-rw-rw- 1 root root 10, 229 May 29 09:59 /dev/fuse appears writable but in ...
3
votes
3answers
5k views

How to prevent users from deleting a directory?

I tried "chattr +i DIRNAME", it's great, but I cannot create files in the DIR after chattr. What else are there to prevent users from deleting a Directory? root@HOST ~] mkdir test [root@HOST ~] ...
2
votes
1answer
102 views

How to sort files separately without merging?

File1: Brazil New Zealand Argentina Uruguay File2: Chile Russia Latvia Switzerland I realize that the command sort -n File1 File2 will sort all the files merged together and display it ...
-1
votes
1answer
33 views

How can I successfuly port W10 files to Ubuntu? [closed]

I just installed Ubuntu (Dual boot with W10) and I can see my W10 partition from inside Ubuntu with all my files. They seem fairly corrupt on the Linux side (Text editors, web browsers, Steam etc) ...
1
vote
1answer
25 views

Finding change in shared object through bash

Here's my case- I have a package named say foo-1.2.3. I want to know which package it installs. So, I install it in a fakeroot approach and make a list of all files it install in a file called FILES ...
11
votes
3answers
2k views

How to check if two directories or files belong to same filesystem

What's the best way to check if two directories belong to the same filesystem? Acceptable answers: bash, python, C/C++.
1
vote
2answers
33 views

Copying Files before They're Finished Transferring [closed]

Using Ubuntu 16.04 ext4, especially for chrome downloads. Can you copy files while they are not finished transferring?
0
votes
1answer
48 views

How to merge or join more than 2 files? [duplicate]

I have four files; file1: gene_id FPKM TRINITY_DN56960_c4_g1 36.91 TRINITY_DN42427_c0_g1 12.83 TRINITY_DN48728_c0_g1 6.22 TRINITY_DN50706_c0_g2 6604.75 TRINITY_DN51449_c1_g1 8.19 ...
0
votes
2answers
44 views

How can I copy a hidden directory recursively and preserving its permissions?

mkdir backupcache cp -rp .cache backupcache # or cp -rp \.cache backupcache does not work nothing gets copied and directory backupcache remains empty
0
votes
0answers
72 views

Count and compare files in Linux

I want to just compare the number of lines in two files. Below is the list of names of files. One file contains names/location of fastq files; the other file contains names/location of bam files. ...
2
votes
2answers
67 views

find command, is there a way to get a progress report?

firstly please forgive my lack of knowledge of Unix - that's why I'm here after all. I've created an AppleScript which searches for files on a Mac and have greatly improved the speed by using the ...
0
votes
2answers
39 views

Copy and rename on collision

I'd like to merge the content of these folders with a command line. . ├── folder1 │ │ file.txt │ ├── folder2 │ │ file.txt │ └───folder3 │ file.txt How can I do this ?
1
vote
2answers
52 views

How to determine which files are necessary in /bin, /lib, /var, etc.?

I'm currently trying to get an image working for a network boot using somebody else's file contents. The previous images I made keeping all original files present were way too big, so I need to shrink ...