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

learn more… | top users | synonyms (1)

-1
votes
1answer
53 views

Generate a tarball or (.tar.gz) of the recently modified files in the directory

As the title says, I need help creating a linux script that generates a tarball or (.tar.gz) of all the files in the directory passed in as an argument to the script and have been modified in the past ...
0
votes
0answers
17 views

Moving Informatica data(directories) from one unix server to another unix server

Can we migrate directories from one unix server to another unix server, without the need of installation of Informatica softwares on the new unix server? If yes, then will there be any change in the ...
0
votes
1answer
30 views

File permissions categories

So I am a little bit confused with File permissions categories. So here is what I do understand and correct me if I am mistaken. For every File , there is an Owner (one user) which have a symbol u ...
26
votes
7answers
41k views

How can I get the size of a file in a bash script?

How can I get the size of a file in a bash script? How do I assign this to a bash variable so I can use it later?
5
votes
6answers
90 views

Exclude directories in locate search

A search with locate finds paths in the filesystem. Often, you know a priori you are interested in either files only, or directories only. A 'locate' search often returns many results. It would be ...
1
vote
1answer
35 views

Recursively list files containing an underscore in the file name

I have a large directory with tons of files and subdirectories in it. Is there a way to recursively search through all of these files and subdirectories and print out a list of all files containing an ...
2
votes
1answer
57 views

Using find and sed to copy 20th line of many files into one file

I have a folder called "PKA1" Within this folder I have several folders that look as: 1eV, 2eV .... 30eV Within each of these I have subfolders I have a file called PKA.dump I want to copy the ...
1
vote
1answer
49 views

Tree with directory name and filenames

I run with tree 1.7.0 tree -PF dat It gives . ├── 0deg/ ├── 105deg/ ├── 120deg/ ├── 135deg/ ├── 150deg/ ├── 15deg/ ├── 165deg/ ├── 180deg/ ├── 210deg/ ├── 240deg/ ├── 270deg/ ├── 300deg/ ├── ...
2
votes
2answers
1k views

How to Free Up Space in a Dynamically Growing qcow2 VM image?

This has happened to one of my VM's that's running CentOS under Proxmox. I copied about 40 GB of data into a VM. I then deleted that 40 GB data a day later. Now taking a backup of the same VM takes ...
1
vote
1answer
79 views

string search using awk

I have file-1 which has list of transaction id . File -1 201503301616|9b8791b3-f860-409f-aad0-24debf834c1b|10.233.18.29.677220869928387637969 ...
-1
votes
1answer
13 views

how to disable folders/files under root folder in RHEL?

I want to "disable" listing of folders and files under root folder in RHEL. So when I login to my application nothing should be visible in root folder.
9
votes
3answers
9k views

Quickly find which file(s) belongs to a specific inode number

I know of this command: find /path/to/mountpoint -inum <inode number> but it is a very slow search, I feel like there has to be a faster way to do this. Does anybody know a faster method?
0
votes
1answer
33 views

How to get new created (not change or modified), & removed files in last 24 hours

I want to write one script where I need the below function : List all the files which are created in last 24 hours. If I give the find command with ctime option then it list all files which are ...
9
votes
2answers
4k views

Why can't I have a folder and a file with the same name?

I've never had this problem before, but for some reason, I can't rename my folder to packages/. This is the structure: root - packages_old/ - packages When I try to rename the folder with ...
5
votes
1answer
142 views

Is it possible to create a non-empty file without write_close and rename event?

The reason why I am asking is because I'm using iwatch (not to confuse with a gadget device) to watch for filesystem events (in my case - file creation/renaming). What I cannot explain is this log: ...
0
votes
1answer
62 views

Expect Scripts - Reading from Files and Accepting User Input

How can I write an "Expect" script to: 1) iterate over a list of IP addresses and log in to each to perform commands (like in a BASH for loop). Right now I just copy/pasted the few lines that are my ...
61
votes
2answers
110k views

How can I replace a string in a file(s)?

Replacing strings in files based on certain search criteria is a very common task. How can I replace string foo with bar in all files in the current directory? do the same recursively for sub ...
0
votes
1answer
37 views

How to set path in cronscript

I am running a cronscript like: */45 * * * * /path/to/php /path/to/file.php it creates a file and put on home directory; But I want to create this file in my desired path like: */45 * * * * ...
1
vote
1answer
30 views

How to move directories based on the output of rhash (CRC32 check of .sfv) with bash/perl?

My idea, is to move the CRC-check OK folders (albums) into a lets say "complete+CRC_OK" folder with a script once per day in cron. I would need to put the rhash command in a loop with number of ...
6
votes
3answers
21k views

undelete a just deleted file on ext4 with extundelete

Is there a simple option on extundelete how I can try to undelete a file called /var/tmp/test.iso that I just deleded? (it is not so important that I would start to remount the drive read-only or ...
5
votes
2answers
417 views

How are mutually untrusted app's files protected in Linux

I am running a Ubuntu Linux machine. When I run applications written by different vendors like Chrome and Firefox, I notice that they all are running with my uid. But if that's the case, any file they ...
2
votes
1answer
37 views

How to list directory/file sizes in general on UNIX-like systems?

In general on a UNIX-like system (Linux, AIX) the following can list file/directory sizes in MByte, even if the filename is starting with a "-": du -sm -- * 2>/dev/null | sort -nr | head -25 ...
1
vote
1answer
36 views

How to use convert command with bash to resize all images in a given directory?

I want to resize all PNG files in ~/somefolder/ whose filenames are NOT started with tn_ to 50% of its original size and rename the output file with a tn_ as its prefix and its original name. I know ...
3
votes
3answers
884 views

Create a virtual file that is actually a command

Is there any way to create a virtual file, such that reading from the file actually reads from the stdout of a command; writing to the file is acually writing to the stdin of a command? So far I have ...
2
votes
4answers
1k views

Get the latest directory (not the latest file)

My folder parent has the following content: A.Folder B.Folder C.File It has both folders and files inside. B.Folder is newer. Now I just want to get B.Folder, how could I achieve this? I tried ...
-1
votes
1answer
23 views

Copy files from find command [closed]

I am trying to copy all *file.log files found using find. The problem is all files are named the same and it is only copying over one file. I need to find a way to rename the files in the command or ...
2
votes
1answer
34 views

Why does chmod succeed on a file when the user does not have write permission on parent directory?

I am trying to understand file/dir permissions in Linux. A user can list the files in a directory using cd test ls -l Even if the user issuing above commands does not have read, write or execute ...
5
votes
2answers
157 views

How can I list files of which no symlinks exist?

I have a large "myfiles"directory full of miscellanous documents and do not want to modify its structure. I therefore created (several) other directories for each class of documents. For example I ...
5
votes
6answers
27k views

How to transfer files from Windows to Ubuntu on Virtualbox?

How should I transfer files from Windows to Ubuntu installed on Virtualbox? When I plugged in a USB, it only pops up in Windows. How can I see it in Ubuntu?
2
votes
2answers
71 views

Print file contents and delete the printed content* from the file

In Linux, from a bash shell, how can I print the contents of a file and remove the content I just printed content from the file? I have a program writing texts to a file repeatedly. On a Linux shell ...
26
votes
6answers
45k views

How to find creation date of file?

I want to find out the creation date of particular file, not modification date or access date. I have tried with ls -ltrh and stat filename.
2
votes
4answers
74 views

Does the inode change when renaming or moving a file?

in PHP the fileinode() functions returns the inode of a file. I was wondering if I can use it to determine if a file was renamed, moved or modified. I did some tests and it seems the inode stays the ...
2
votes
4answers
55 views

input file stream to command

How is it possible to send a file stream to this command instead of a file? /usr/local/bin/wkhtmltopdf --title "$SUBJECT" -q $SOURCEFILE $OUTPUTFILE The file stream is from a string in PHP.
1
vote
1answer
34 views

Can I restrict sudoer nopasswd to directory?

Maybe I should rephrase - what is the most secure way to accomplish my needs? Details I am using WinSCP to modify my Apache document_root. The directory /var/www/html has an owner and group of root. ...
2
votes
3answers
58 views

Can a file be edited with the 'write' permission on it but not on its parent directory?

Suppose the owner/user doesn't have the write permission on a directory but he has it on a file under it. Can the file here be edited or not? If yes, is there any situation where the file cannot be ...
5
votes
3answers
499 views

Dynamic file content generation: Satisfying a 'file open' by a 'process execution'

I have a read-only file, F. A program, P, that I'm not the author of, needs to read F. I want the content of F to come from another 'generator' program, G, whenever P tries to read F (taking F to ...
0
votes
1answer
47 views

Search a file for a string in multiple directories

Can someone please help me with a command to search a file for a string in multiple directories? I am searching for the VIP in httpd.conf in multiple httpd instances. I am using: find ./ -name ...
0
votes
0answers
39 views

Touch a file and give it an icon image via command line

Imagine this situation: for a given task, at some point of it, I should be able to create an empty file, which I can achieve by touch file.ext on the command line. However, if I touch a .jpg file, and ...
5
votes
2answers
72 views

rsync doesn't preserve directory ownership even with -a

I use this rsync invocation to backup my home directory: rsync -aARrx --info= --force --delete --info=progress2 -F "$USER_HOME" "$BACKUP_MNTPOINT" rsync man page says that -a implies -g and -o ...
2
votes
2answers
66 views

vim: how to trace back all changes done to file during the day

Does anybody know how to setup vim (the text editor) in such a way to make it possible to trace back all the changes done to a file within a day? I need it for the cases when I have accidentially ...
0
votes
0answers
25 views

backup without closing programs that are opening files for editing, and detect unsaved open files?

Is it possible to do backup without closing programs that are opening files for editing? I would like to do backup without closing programs that are opening files that I am reading or writing. I ...
0
votes
0answers
24 views

Cancel removing a directory, and want to find out what have been removed

I was removing a directory by rm -r mydir and cancelled it in the middle. How can I find out what have been removed under the directory? Does remove a content of a directory change the timestamp of ...
0
votes
1answer
29 views

Unable to delete a file on different user's directory

I've two user's abc & xyz and the user abc has been added to the group xyz via usermod -a -G xyz abc and here the file permission on home directory of xyz i.e /home/xyz: drwxrwxr-x 2 xyz xyz ...
1
vote
1answer
57 views

Difference between owner/root and RUID/EUID

I am relatively new to the concepts mentioned in the question and reading about them from different sources only makes them more confusing. So this is what I understood so far: When we are given ...
4
votes
1answer
42 views

Recovering data written to file that moved

I have a Python daemon running on CentOS that opens a file at the beginning of a session, and keeps writing to it. A cronjob however, gzipped the file that was being written to, and so the file moved ...
3
votes
2answers
73 views

How to list files on terminal so that we can see the file types such executable, ascii etc?

I have been trying to list files in directory using ls and passing it different options. Does it have the ability to list types of files as well ? I want to know which ones are executable , ...
2
votes
1answer
33 views

Why am I seeing a number as owner / group instead a name?

CentOS 6.x / OpenVZ Recently my VPS provider moved my OpenVZ container to a new server. After that move, I've noticed that files/directories for one of my user accounts show an odd owner / group. ...
17
votes
6answers
10k views

How can I do a “copy if changed” operation?

I would like to copy a set of files from directory A to directory B, with the caveat that if a file in directory A is identical to a file in directory B, that file should not be copied (and thus its ...
1
vote
1answer
23 views

How to determine the only additional file in otherwise two identical listings?

I have done a listing of the device folder two times, one time without the sd-card in the slot and one time inserted, the system automatically adds one file in the device folder. $ ls /dev | wc -l ...
2
votes
1answer
51 views

How to change only the mtime of a directory?

I am trying to change just the mtime of a directory by adding files or sub directories but that changes the ctime of the file too. Is there any way to just change the mtime without affecting the ctime ...