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

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0
votes
1answer
13 views

A command showing if I have the right to perform writing?

I'm searching for a command which only says if the current user has r-rights (read) on the file passed as a parameter. This command could be something like haveIRights -x <file> and it has to ...
0
votes
2answers
25 views

cat /dev/null emptied my log file but size did not change

I'm quite new to Unix. Using Solaris 10 I faced the below issue. There is a large log file with size 9.5G. I tried to empty the file using the below command. # cat /dev/null file_log.txt By doing ...
2
votes
1answer
35 views

Default files in home dir for each user

I'm using ubuntu server 14.04. I want to add some files and folders by default in each user's home directory, whenever a user account is created.
5
votes
4answers
212 views

Ways to organize and access frequently visited directories and files?

In my Ubuntu, I have added some frequented directories to the bookmarks of Nautilus, for visiting them quicker. Nautilus can consume a lot of memory, when it has been kept open for long and there ...
7
votes
3answers
586 views

How can a log program continue to log to a deleted file?

From the Unix Power Tools, 3rd Edition: Instead of Removing a File, Empty It section: If an active process has the file open (not uncommon for log files), removing the file and creating a new ...
-1
votes
1answer
24 views

Is %a an option of stat?

Usage: stat [OPTION]... FILE... Display file or file system status. -L, --dereference follow links -f, --file-system display file system status instead of file status -c ...
3
votes
2answers
112 views

filename and pathname of a file

It is said that the filename of a file is a pointer pointing to the inode of the file. Before knowing that, I thought it was the pathname of a file that does that job. I am not sure how a pathname ...
3
votes
1answer
57 views

How does `stdin` of linux work?

I know that stdin refers to standard input in linux, usually the keyboard. It can also be referred by file descriptor 0. So, which file descriptor does the (standard input) mouse refer to? Or is it a ...
2
votes
3answers
75 views

Count files in a directory by extension

For the purpose of testing, I'd like count how many images files are inside a directory, separating each image file type by file extension (jpg="yes". This because later it will be useful for another ...
3
votes
3answers
77 views

Copy a file and overwrite the existing file

I have two images (image1.png and image2.png) in the same folder on my server, I want to run a command that overwrites image2.png to image1.png. I prefer to overwrite the image instead of deleting it ...
4
votes
2answers
185 views

Should /usr owner be root?

After having installed the MySQL database on openSUSE I realized that for all files in /usr/bin the owner was changed to the "mysql" user of the "mysql" group. Maybe there was some mistake of mine. ...
2
votes
1answer
922 views

Sphinx Search shutting down after `FATAL: accept() failed: Too many open files`

I'm running Sphinx Search Server V2.06 ( the latest stable release ) on an Amazon EC2 with Linux CentOS. In general it is running fine, but the searchd.log is showing this error over and over with ...
2
votes
0answers
38 views

Removing duplicate files but ignoring certain lines (e.g. embedded timestamp)

I have a bunch of gzipped text files. I am trying to remove duplicate files (using fdupes) but the problem is these files contain a line that has their timestamp in them, and the files are identical ...
3
votes
2answers
106 views

Valgrind /usr/lib files are not regular Linux files

The problem that I encountered today (on an embedded device with Linux) is that some files (specifically, the Valgrind /usr/lib files) are behaving very strange and they are not copy-able with scp ...
18
votes
4answers
6k views

How to properly and easy configure `xdg-open` without any enviroment?

I'm using OpenBox window manager without any desktop enviroment. xdg-open behaves strangely. It opens everything with firefox. $ xdg-settings --list Known properties: default-web-browser ...
1
vote
1answer
10 views

Unzip all non-existing or older files from archive

The behaviour I'd like with unzip is to extract all files, overwriting any that are older than those in the archive, not touching any that are the same age or newer, and to never prompt. The options ...
14
votes
5answers
20k views

Script to monitor folder for new files?

How do I detect new files in a folder with a bash script? I would like to process the files as soon as they are created in the folder. Is this possible to do so or do I have to schedule a script with ...
3
votes
2answers
34 views

fdupes - delete files after comparing two directories

I'm currently trying to solve an issue using fdupes. I'd like to compare two folders with each other, and afterwards delete all duplicate files within one of these directories. Example: Files are ...
38
votes
8answers
21k views

How can I edit multiple files in VIM?

I know I can open multiple files with vim by doing something like vim 2011-12*.log, but how can I switch between files and close the files one at a time? Also, how can I tell the file name of the ...
4
votes
1answer
19 views

. (dot) in file mode [duplicate]

I tar a folder on windows and untar on RHEL machine. ls -l shows a . in file mode and folders are in blue + yellow background. [root@xt-storage-01 apache-tomcat-8.0.5]# ls -l total 120 drwxrwxrwx. 2 ...
5
votes
2answers
268 views

How is the inplace modification of a file being done?

What does the "inplace" modification of a file e.g. via sed -i or perl -i mean? My question is about how this inplace modification is done. Is the file copied the modification is done in the copy and ...
4
votes
2answers
135 views

Faster way to rename duplicate files (identified by fdupes) in another directory?

I have a directory full of pdf files of journal articles, most of which are named by their bibtex key. Some time ago I made a backup on an external hard drive, but I haven't kept it up to date and ...
9
votes
4answers
3k views

Is there a way of deleting duplicates more refined than fdupes -rdN?

Recently I have the need to delete a lot of duplicates. I am merging three or four filesystems, and I want the space to be used economically. At first, fdupes seemed like it was the best tool for the ...
5
votes
2answers
129 views

File handles and filenames

I read this post. Are file descriptors the same as file handle? While trying to configure the linux kernel, it asks open by fhandle syscalls (FHANDLE) [Y/n/?]. Why is this option provided? Does ...
1
vote
1answer
25 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 ...
0
votes
1answer
26 views

Give a user the permission to access files in a directory

I have mounted a volume from NAS storage to my Solaris 10 machine using NFS. I want to give read/write permission for a user to the directories and subdirectories and files. I have tried setfacl -m ...
3
votes
1answer
39 views

How do I use sudo to run multiple commands as another user within a portion of a script?

I'm trying to run the following: if [! -f .owner ]; then creator=$(whoami) sudo -u appuser ksh echo "$creator" >> .owner mkdir test1 test2 test3 exit fi However, the ...
1
vote
2answers
116 views

How would I change file permissions if the file name has a space in it in linux [duplicate]

I would like to know how would I rename and change file permissions of a file that contains a space in the name on Linux. Example The name of my file is: my file I have tried mv my%20file my_file ...
14
votes
3answers
5k views

How to list files that were changed in a certain range of time?

How can I list recursively all files that were changed between 22.12.2011 and 24.12.2011?
-1
votes
4answers
93 views

Need a command sequence that will move files from one directory to another based on a particular year? [duplicate]

I'm looking for a sequence of commands (one liner would be ideal) which will identify all the files created in particular year, and move the resulting files to another directory.
3
votes
1answer
23 views

Can close() block?

For example, if you close a pipe or socket that still has data in its write buffer that hasn't been read by the process on the other end, does close() block until the data is read or the other process ...
8
votes
4answers
567 views

Why does “cat ttyUSB0” not produce output?

I connected an infrared receiver to a USB port ... (the last line of dmesg tells device file) $ dmesg [10496.596063] usb 7-2: new full-speed USB device number 2 using uhci_hcd [10496.751112] usb 7-2: ...
36
votes
5answers
18k views

How to remove duplicate lines inside a text file?

A huge (up to 2 GiB) text file of mine contains about 100 exact duplicates of every line in it (useless in my case, as the file is a CSV-like data table). What I need is to remove all the repetitions ...
2
votes
2answers
115 views

Difference between `ls -c` and `ls -t`

What is the difference between -c and -t options for the ls Unix command? And how can I sort by date of creation with the ls command?
1
vote
0answers
20 views

Recover deleted files on Raspberry Pi? [duplicate]

So I just rm -rf'ed a folder with a few files I need. Yes I know I should've had a backup, but it's just a Pi. It's designed to be played around with! Is there anything I can do to recover that ...
6
votes
2answers
277 views

How to find out which program can open a given file?

Let's say I have a file thesis.pdf or picture.jpg Is there a command which returns a program to open this file with? I am aware of the command file, but it just returns the correct type of the file ...
4
votes
2answers
62 views

How to redirect stdout to a file and read from the same file simultaneously with another task?

I want to run a task (which takes quite a long time) remotely in Ubuntu Linux Bash via nohup and redirect stdout to a file, e.g.: nohup task > out.txt & From time to time I would like to ...
4
votes
1answer
118 views

FILE size limitation according to Robert Love's textbook

From Robert Love's Linux System Programming (2007, O'Reilly), this is what is given in the first paragraph (Chapter 1, Page 10): The file position’s maximum value is bounded only by the size of ...
22
votes
5answers
12k views

Determine which process is creating a file

Given file path, how can I determine which process creates it (and/or reads/writes to it)?
3
votes
2answers
43 views

The reverse of `tree` - reconstruct file and directory structure from text file contents?

We all know we can use tree to get a nicely formatted text "visualization" of the structure of a directory; say: $ tree -spugD /usr/include/boost/accumulators/numeric/ ...
1
vote
2answers
31 views

scp and file owner

What are the reasons that could make a change in a file ownership after scp'ing it from one server to another? The file ownership changed from 'owner' to 'apache'. I used scp -p . The user 'owner' ...
1
vote
4answers
588 views

Solaris 10 : Remove trailing blank lines from multiple files

I'm working on Solaris 10.What is the easiest way to remove blank lines from multiple files at once?
2
votes
1answer
302 views

Hang during 'touch' operation on NFS mount

I have two NFS clients mounted to an openfiler 2.99 NFS share at 192.0.2.3: 192.0.2.1 mounts 192.0.2.3:/mnt/nfs01/volnfs01/share01 with ...
5
votes
1answer
192 views

How could I restrict directory content by file type?

Is there a way to restrict directory content by the file type? For example, I have an upload directory that I only want users to put images in, could I go a step further & actually put a ...
2
votes
1answer
22 views

Desktop app run by admin user (but not explicitly with sudo) takes file ownership of shared file

Similar to http://stackoverflow.com/questions/15143614/file-ownership-changes-to-root-after-saving-from-a-program-in-ubuntu but I can't use the answer since I'm not running a command-line app as sudo. ...
3
votes
3answers
41 views

Moving latest files from one directory to another

I'm trying to move newest files from one directory to another directory. The find command finds the files but not moving them to another directory. The destination directory exists. $ cd ...
1
vote
1answer
25 views

Does “freshening” a zip file with the -FS option change the modification time of the file?

I have a zip file that I use as a backup for my work. I use the "freshen" option (-FS) whenever I want to update my backup file. However, the file shows the date of last modification as being the ...
5
votes
1answer
140 views

Cannot cat or grep contents of file

I'm on Debian Jessie. When I open a new textfile with mousepad and save it, then modify it with vim and save it again, I cannot print or grep the contents of it anymore. If I do cat file, nothing is ...
0
votes
2answers
42 views

Getting rsync failures randomly

I am getting the following rsync errors randomly from my capistrano scripts. rsync: stat "/app/test-0.1-SNAPSHOT.jar.SB4uq7" failed: No such file or directory (2) rsync: rename ...
4
votes
3answers
7k views

How to recursively list all hidden files and directories?

I want to list all hidden files and directories and then save result to file. Is there any command for this?