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

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1answer
32 views

How do I synchronize 2 xml files?

I have 2 xml files named 1k.xml and 1n.xml. The file 1k.xml contains some additional elements and data which are not there in 1n.xml. I want to copy whatever is absent in 1n.xml to it, so that both ...
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1answer
18 views

Rename command with non-existing target directory

I'm trying to group files automatically into subdirectories using a command like this: $ rename 's/(.)(.)(.+)/$1\/$2\/$1$2$3/' *.* A dry run with the -n parameter shows me what I want: test.jpg ...
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2answers
25 views

move content from a folder with unknown name up one directory

I have data arranged as follows: --parent_dir | --4Bz27go1c | -- foo.md -- bar.tar.gz -- baz.c .. I have a parent directory with a known name and a child ...
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4answers
107 views

Script to delete files that don't match certain filenames

I have a folder with 500,000 images, sorted in subfolders by year and month. I'd like to create a script that does this: If the filename does not match any of the filenames in names.log then delete ...
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1answer
17 views

How to display metainformation for different kinds of time of a file ?

As far as I know each name within a path, e.g. /name1/name2/name3, is allocated to one inode. This inode is a collection of meta information for each name (file or directory). Some of these ...
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4answers
66 views

Dynamically reference a file's name

In a single directory, I'd like to replace the first line of each file with the file's name. Each file has as the first line "TestRelation." I'd like to replace it with the file's name. I know I can ...
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1answer
54 views

Find which file contain a particular keyword using `grep`

Suppose I know I have to change myhostname = abc.domain.lcl to myhostname = abc.domain.glbl directive but I don't know in which file exactly the directive myhostname is in (i.e., say I have never ...
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1answer
38 views

How to upload to a unix server?

Im a part of a project group, and one of our tasks is to upload some content to a server. I am completely new to this and have some questions. There are content on different servers(distributed on ...
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2answers
189 views

Read line from file then delete

How can I read a series of lines from a file and then remove each line? Obviously I can read like this: while read -r line; do echo $line done < myfile.txt But if I do this: while read -r ...
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1answer
23 views

What is the difference between these two sets of command for configuring ACL permissions?

Hi I am wondering what is the difference between the two sets of commands below: 1) To allow Davis to access and modify all files and folders in the the home directory of John # setfacl -m ...
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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, ...
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1answer
61 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. ...
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2answers
114 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 ...
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4answers
404 views

How to delete the files in one folder which are more than 60 days old in UNIX?

I know how to delete the files which are more than 60 days old by modification time, but I want to delete files based on a timestamp in the file name. For example, I have the below files for each day ...
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1answer
49 views

How to change double hyphen to single hyphen of file names?

I have been using the rename command to get control over my naming conventions across my system. In converting spaces in file names to hyphens, I have inadvertently created consecutive hyphens in some ...
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1answer
78 views

Delete a directory under Cryptkeeper without access to its account

I have a computer with read-write permissions for one of it is directories. I lost the password that can help me to log in to that directory. How can I delete this folder. I am using the following ...
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3answers
959 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
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4answers
84 views

How to do grep even if the file is not present?

I am doing something like this in my code file_nm=`ls -latr *abc*` if [ `grep "search_txt" "$file_nm" | wc -l` -gt 0 ] then echo "string found" else echo "string not found" fi If the file_nm is ...
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1answer
85 views

Understanding grep and pipes in linux

I came across this post which explains my problem. Suppose there is a file called file.txt which contains "foo World". The answer posted by Tyler explains a lot however I am confused as to how cat ...
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1answer
43 views

Find files belonging to a group

Actually I want to find all the files and folders that are under the same group, for example I have this : [test] user1/sam a.txt user9/sam b.txt user4/sam I'm looking for a command ...
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1answer
230 views

Root is receiving “operation not permitted” error when trying to move a a users .bash_profile

This are the permissions on the RHEL5 machine: [root@server1 belmin]# ls -la | egrep '\.(bash_profile)?$' drwx------ 9 belmin belmin 4096 Sep 16 14:29 . drwxr-xr-x 40 root root 4096 ...
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1answer
35 views

Log new files in a directory

Is there a tool, which lets me know about the last newly created files? The still common way of using a hierarchically file system makes it hard to save files in different places, so sometimes I sort ...
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3answers
208 views

Unable to delete files as a root user using RS232 serial cross cable

I have a device(CCTV decoder) which was rebooting itself, so cant login using LAN cable. It has RS232 port only, no VGA and keybord/USB port(Embeded PC). I connected RS232 cross cable and used ...
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1answer
56 views

How to find which application is creating a particular file in a path? [duplicate]

The issue is that, one particular flat file is getting created in a directory. I'm not sure which application is creating that flat file. I am using Unix environment. Is there any possibility to ...
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1answer
77 views

How to Link File URLs?

I am currently running WordPress/Woocommerce on an Apache server. I have files for sale on the server, located outside of the public path for security. I am attempting to link the downloadable files ...
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2answers
168 views

Permissions under a 700 (rwx------) directory

If a directory /foo/bar/baz has 700 (rwx------) for its permissions, thereby making it inaccessible to all but its owner (and the superuser), does it matter what the "group" and "other" permissions ...
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1answer
55 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 ...
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2answers
157 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: ...
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2answers
148 views

tar specific files based on a pattern

I got a lot of files with the following format: 2014_04_01_11.txt 2014_04_01_12.txt 2014_04_01_13.txt 2013_03_25_12.txt 2013_04_29_15.txt I would like to tar all theses files into an archive 20?? _ ...
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2answers
160 views

File not displayed using vi but visible with command ls -l CD*

I can do an ls -l CD* and see the following output. CDTEST userA RW RW R I am logged in as userA. But if I do an ls -l the file does not appear. If I do vi CDTEST it tries to create a new file ...
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1answer
276 views

brasero.toc.bin is very big — why?

I have a file in my home directory: brasero.toc.bin, which ls gives as: -rw-rw-r--. 1 Harry Harry 633M 2013-09-26 15:53 brasero.toc.bin in fact it is the second largest file listed, only sdc at ...
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2answers
75 views

Something like a symbolically linked file, but with change details attached?

Is there a file type or method for using files in which certain files look and behave like symbolically linked files, but contain extra meta information for changing the data when they are read? ...
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1answer
164 views

Monitor file access count by user

I have written a script which is deployed just by putting it in a globally accessible location for all users. I want to log the usage of this script. Is there a way in Linux to find out how many ...
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1answer
299 views

Auto detect new files and upload them [closed]

I'm starting work on a new project and I need to know the feasibility of the end-result. I need a lot of things to happen automatically. Detect if a new file has been added to a folder Login to a ...
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1answer
126 views

touch and tar from a text file

Am trying to zip a certain number of files and am stuck at below point, ls -lrt /lag/cnn/*/*/*/adb.tar.gz | grep -nri ABC >> sample.txt In sample.txt i got filesNames on which i have to do ...
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1answer
37 views

How to ignore files if there is an similar file with the same size?

I want to list the files in a directory, using ls. Typically, the files in that directory have the same name (except for the extension - one has extension .rej, one has .failed) . If a pair of files ...
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2answers
12k views

Copy only regular files from one directory to another

I'd like to copy a content of directory 1 to directory 2. However, I'd like to only copy files (and not directories) from my directory 1. How can I do that ? cp dir1/* dir2/* then I still have the ...
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2answers
179 views

multiple conversion bam to bed using bedtools

I have ten .bam files (bioinformatic format) and I would like to convert it to 10 .bed files, but for this conversion I need to use special command bedtools bamTobed -i (input file) > output ...
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2answers
245 views

What the “+” and “-” buttons do in Pantheon-files (files manager in Elementary OS)?

When setting the view to "Grid" in Pantheon Files (Elementary OS), there is this option to click a "+" or "-" button on folders and files. What is that? After clicking the "+", this may be ...
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1answer
847 views

Where is the trash folder in FreeBSD / PCBSD?

I'd like to delete - undelete files using the shell in PCBSD. But... I don't know where the "trash" folder is. Can anyone tell me?
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2answers
2k views

Cheapest way to find the oldest file (recursively) from a directory under heavy load

What is the least expensive way to find the oldest file in a directory, including all directories underneath. Assume directory is backed by SAN and under heavy load. There is concern that "ls" could ...
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2answers
99 views

how to count number of differences in large streams quickly?

I want to count the number of differences (different bytes) in two large streams (devices/files). E.g. two hard disks, or one hard disk and /dev/zero. The program(s) involved must be fast, as fast ...
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2answers
162 views

How can find support large files?

I would like to find all the files of my system, which sizes are more than a couple gigabits. I thought I would use find -size, but the man page states: The size does not count indirect blocks ...
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1answer
861 views

Getting back rsync's deleted files [duplicate]

I accidentally rsync-ed to a server using the delete attribute when I shouldn't have. Is there any chance of getting the data on the server that rsync removed.. back?
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1answer
143 views

Standard I/O File Descriptors

I am new to Shell SCripting I code this $ ls -l 1> stdout.txt and I get the output as desired, 1> stdout.txt redirects the output from standard output to the file stdout.txt. I don't ...
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2answers
440 views

reading from a file and changing its pattern into an array?

I have a CSV file containging entries like this : ipaddress,VLAN,VLANid 10.192.168.1,vlan-xyz,3 10.192.168.1,vlan-abc,8 10.192.168.1,vlan-mnp,11 10.192.163.24,vlan-llz,3 10.192.163.24,vlan-bbz,5 ...
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1answer
97 views

How do I give global access to a file in a private folder?

For example, I want all the files in /home/trusktr/Downloads/ to remain hidden from other users, except for one. I tried chmod 777 /home/trusktr/Downloads/someFile.avi but someFile.avi is still ...
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1answer
647 views

Samba share file permissions - users can't open files that I create

I have set up an Ubuntu server (12.04 LTS) for samba file sharing. The problem I'm having has to do with files that I create on the server. Other users can't open them because I created them under a ...
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2answers
101 views

Is there some kind kind of hosts.additional file for Linux

If you have a list of servers all linking to each other by static addresses, is there some kind of hosts.additional you can use as some kind of file based DNS? ie The hosts file contains static ...
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3answers
166 views

Deleting the starting 10 MB from a open file

I have a log file of size nearly 100 MB which is opened by some program and logging is continuously going on in that file. I want to delete the first 10MB from that file. Is there any way to do that ...