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

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1
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2answers
85 views

Sort files into directories named by prefix of file

I have a bunch of files like this 5830_1.png 5830_2.png 5830_3.png 5831_1.png 5832_1.png 5832_2.png I'd like to sort these files all into directories that take the prefix of the file name as the ...
4
votes
4answers
160 views

What is the Linux command to display how many file names in the directory end in two digits

What is the Linux command to display how many file names in the directory end in two digits? Using ls with a command like this : ls -l | wc –l *[0-9][0-9]
1
vote
2answers
120 views

using inotify to monitor access to a file

I would like to have a trigger and when a particular file is accessed by some process, I would like to be notified (i.e. a script should be run). If I understand correctly, this could be achieved with ...
0
votes
2answers
97 views

Linux - Delete last two files automatically

In Linux, one folder is created every morning and 5 files are created in that folder. At the end of the day (Midnight), the last two files in that folder have to be deleted. How can I accomplish ...
5
votes
3answers
354 views

Linux command to return all files that start with TEMP but do not end with double digits

What is the Linux command to return all files that start with TEMP but do not end with double digits? I think it should look something like this: ls -l TEMP*[!0-9][!0-9] but the results of my ...
3
votes
5answers
119 views

Look if a folder has some files of certain extention

Lets say I have a file structure: $ cd /home/Desktop $ ls -d */ Abc/ Qwe/ Zxc/ Rty/ $ Now I want to iterate through every directory and look if they have any .pdf files. Could some one please ...
1
vote
1answer
45 views

Why won't my system now show the directories and files in /media/sda7?

Summary: Could you tell me please if there is a way to restore the directories and files beneath /media/sda7 that are no longer being shown by my file manager or ls? My system is Debian. Full ...
4
votes
2answers
88 views

Linux File Permissions Enforce Order

I just ran into something unexpected (for me) regarding file permissions on Linux (Arch Linux). Basically I have: userX in groupX fileX userX:groupX ---rwx---- What puzzles me: I cannot perform ...
0
votes
1answer
66 views

How do I create a RAM disk on Linux Mint?

I am running a package that adds data to the end of 140–300 files each time through the process. I'm thinking of moving the process to a RAM disk, and using rsync to copy it back when done. My goal ...
1
vote
2answers
73 views

Shell script to Capture the file name and size in csv file and add header on that file

I have a number of zip files in a certain folder. I want to capture file name and the size of the files in a CSV format in day wise and put it in crontab so I can report on a daily basis, and then ...
5
votes
4answers
325 views

Check if a folder has a certain type of file present

How could I check if a file has a file of extension .java? So far I have: for javaFile in *.java ; do { echo "The file $javaFile has : " >> ~/Desktop/externalServers.txt ...
0
votes
1answer
162 views

Transfer files from CentOS VM VirtualBox to Windows host machine

How can I transfer the scripts and text files I've created in my CentOS environment and put it in my host desktop (Windows 7)? I've tried using ftp but it needs to configure the routers to use vsftpd, ...
2
votes
2answers
154 views

Any way in Bash to write to a file every X seconds without closing it?

The hardware watchdog on my system needs a 0 written to /dev/watchdog at less than 60 seconds interval or it will fire. The file handle must be kept open however or the watchdog is then disabled. ...
5
votes
2answers
56 views

How to backup dir structure ignoring files & dirs without read permission

Any ideas how to back up a directory structure for which there are some files and/or directories for which you do not have permission to read? I'd like to just ignore those, without backup (tar? jar?) ...
2
votes
1answer
51 views

what is the original command to create a file? [closed]

we can create a file by a lot of commands: cat > foo.txt echo 'This is a test' > foo.txt touch foo.txt vi foo.txt (or any text-editor) my questions are: What is the original command to ...
3
votes
2answers
225 views

Read all files in folder and subfolders - progress and size

Command I have is: time find . -type f -print -exec cp {} /dev/null \; This command finds all files in current folder and subfolders, print the name of each file and copy each of them to /dev/null. ...
1
vote
1answer
43 views

Emacs, complete list of color “keys”

If you want to customize the colors in Emacs, specifying them in the .emacs init file, without installing any extra package, and without using a pre-made theme, something like this seems to work: ...
2
votes
2answers
91 views

inotifywait different action on file or dir

I'm trying to make a inotifywait script take different actions for files vs folders if it sees a close_write flag being raised in the watched directory, but cannot seem to get the checks working. In ...
1
vote
2answers
33 views

List of files accessed by application

I want to install propertiary AMD driver but I would also like to know which files were created/changed by installer. Is there some application which can observe (probably by inotify) which files were ...
2
votes
2answers
73 views

how to show total files size in a folder by filtering extension without showing each file size

du -hc *zip shows me total size of zip files in a folder, but it shows also every single file size of the folder. I only need total size. Is there way to show the total size of a folder without ...
6
votes
5answers
646 views

Is there a way in Linux to have one non root user check if another non root user has permissions to a folder / file?

The scenario is this - I have a command line program that might not run as root, part of the requirements is to warn if another user has write permissions to some folder / file e.g. I'm running as ...
0
votes
1answer
43 views

Execute scripts without decrypting them

I have a set of scripts (bash, ruby, python) and want to put everything into a container like file so I can deploy this container on a lot of servers. This scripts need to protect from accessing other ...
1
vote
4answers
111 views

How do i get the latest file from a list of files in a particular directory

I need to get the latest file from a list of files in a particular directory. When I run the script the first time I've copied the list of files in a particular directory to another directory. From ...
3
votes
3answers
198 views

Shell script to replace string in multiple files within selected directories

I created the script below which takes the path of a single directory and replaces search string in all the files within that directory. I would like to enhance this script in such a way that it can ...
1
vote
2answers
115 views

How linux know the type of the file it is dealing with? [duplicate]

In windows the OS know the type of file by using extension: exe,doc,ppt,pdf .... etc In Linux as we know that the extension is useless. My question is how can Linux know the type of file it is ...
0
votes
1answer
44 views

Partition is out of space

When I was trying to resolve the issue as seen in this question, I figured out that a specific partition is out of space. I have a specified folder which I allow all ftp uploading of multimedia files ...
2
votes
0answers
25 views

Image set compression

Is there a good open source (not exclusive to Linux) for compression of a set of similar images? I have thousands of documents scanned but I do not access them often. The documents are forms, with ...
-2
votes
2answers
39 views

Clarification on permissions with GID & UID in UNIX

If Test1 & Test2 are users, then Test1 : UID : 501, GID :501, groups=501,100 Test2 : UID : 502, GID :502, groups=502,100 What will be the correct option from below and explain how? Test1 ...
3
votes
1answer
111 views

Automatically detect when a file has reached a size limit

I would like to send an email when a file reach a certain size limit. The only way I thought of doing this is by doing a cronjob which will check the file size and send the email if the file is ...
1
vote
1answer
47 views

How to Test if a file has characters in it?

So i have a part of this code and U want it to output "No such player" if only the names file is empty, i've tried using the test -s command but it gives an output of 0 even if the file is empty or ...
1
vote
1answer
55 views

How to install a .bin file that gives the error that it needs more space in /tmp?

Here is the error: ~]$ ./jdev_suite_121200_linux64.bin 0%....................................................................................................100% Not enough disk space in dir ...
3
votes
1answer
74 views

How unique are checksums?

I have a lot of files I need sorting; and sadly there are many files with the same name but different content, and there are the same content with different filenames. I'm thinking about using md5sum ...
0
votes
1answer
31 views

Why does “file foo.css” and “file bar.css” have different outputs?

For example, executing file styles.css outputs: styles.css: asssembler source text whereas file bar.css outputs: bar.css: ASCII text Even better, is there a way to convert my file styles.css to ...
1
vote
1answer
52 views

linux command stuck

I have strange problem on my Linux machine When I do the following simple command chmod +x /tmp/file chmod is stuck and not returned the prompt what could be the problem? the same issue when ...
1
vote
1answer
41 views

With mv, possible to put a time dependence on files mv'ed?

Let's say there's a specific time and date I have in mind. All files last edited before this date I want to keep in the directory but all files that have been edited since this date I want to mv ...
3
votes
1answer
64 views

Two users with different permissions on same directory

Is it possible to give two users different permissions on the same directory? I want to use it for ftp: userFull gets R+W and userLim gets only Read, depending on who logs on. Im getting stuck on the ...
1
vote
1answer
113 views

Unreadable backup directory on a USB drive

The title pretty much sums it up. I was editing a script I wrote some time ago to automatically backup the contents of my Raspberry Pi SD card, and in the course of editing, I missed a "/", and so ...
1
vote
1answer
38 views

Is there a command which creates a temporary file containing the arguments passed to it?

I can paste the contents of a file into a command using cat and backticks: ls `cat filenames` Is there a way to do the reverse - to turn a string into a (temporary) filename? gcc -o cpuburn `uncat ...
2
votes
2answers
118 views

find the single largest file

We host a share of size 4 TB. How efficient is it to find a file with highest size. Usually we use: du -ak | sort -k1 -bn | tail -1 and it is not easy to scan through a share of such huge size and ...
7
votes
6answers
497 views

How can I get a specific line from a file? [duplicate]

I want to extract an exact line from a very big file. For example, line 8000 would be gotten like this: command -line 8000 > output_line_8000.txt
4
votes
2answers
126 views

Is it possible to prevent files created being world-readable?

Assume a user uid=1000 and guids=1000,33,277 is allowed to create a file in the folder /files/. Is there any way I can prevent that the this user allows others to read the file (which are not at least ...
1
vote
2answers
80 views

Create file with specific formatting from directory contents

I am using Solaris and csh. In $home/test there are five files: a.txt, b.txt, c.txt, d.txt and e.txt. If I run % find $home/test/ -type f -print > ../filenames.txt that file will look like: ...
1
vote
7answers
723 views

Can grep be used for searching files with some string in their names?

I understand that grep can only be used for searching for files which contain a string in their content. Can it be used for searching for files with a string in their names? I read the manpage, and ...
0
votes
0answers
48 views

How to mount multiple iSCSI images too loop

I have to mount iscsi images to loop. Yesterday someone with a similar problem asked that already. The difference is, my iscsi image is splitted into 5 parts. ls -la insgesamt 4718592004 -rw-rw-rw- ...
4
votes
1answer
68 views

mapping a split file to /dev/loop0

I have a iscsi disk 2TB large. I make backup of that disk every week. The backup script copies the image of the whole iscsi disk into a file on my NFS. Unfortunately, it does not copy the image in one ...
4
votes
2answers
64 views

setting default permissions with setfacl

I am trying to set default permissions on my directory structure using acl. I would like to have following default permissions for directories and for files respectively: drwx--x--- -rw-r----- but ...
0
votes
1answer
57 views

Move Data from Partition to Partition on Same Drive

Moving data from one drive to another is slow. Copying data on a drive to it's self is slow. Moving data from one drive to it's self is fast. If I'm moving data on the SAME drive but a different ...
1
vote
2answers
146 views

Find when the file was closed in Unix

I know ls -l will give the modified time of file, but it is giving the time when the file was opened, not closed (using Ctrl+D or something) Please tell me how to find the time of file closed ...
0
votes
0answers
60 views

Strange issue with xml_split in Linux

I am using the code xml_split from https://metacpan.org/pod/distribution/XML-Twig/tools/xml_split/xml_split to split a huge XML file. I am facing a strange issue with this. First, I tried the ...
1
vote
0answers
46 views

How do I make get-iplayer produce watchable quality without huge filesize?

Summary findings: I'm using get-iplayer v2.82. The files I produce on hard drive are all mp4. I've discovered the following (downloading same TV program in both cases): Using --modes=flashstd and ...