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

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4
votes
2answers
312 views

Job to keep a count of XML files

My friend works in a IT company where he is required to keep a count of XML files inside a directory (including subdirectories). However the count using ls -LR | grep .xml or similar takes a lot of ...
1
vote
1answer
940 views

How to install/setup psftp in open suse linux?

I'm a newbie in linux. we need to do a file transfer from an open SUSE Linux server to a Windows server and vice versa. We are required to use psftp for the file transfer. Can anyone tell me how to ...
12
votes
4answers
4k views

Creating an arbitrarily large “fake” file

I would like to create a special file similar to /dev/null or /dev/random, where the file doesn't actually exist but you can read from it all the same, except that I could actually set a cap on the ...
2
votes
2answers
2k views

Size of data that can be written to / read from sockets

I was wondering if there is an easy way to find the maximum size that is supported by Linux sockets? (Is this configurable? If so where?) For example, most of the socket examples found on the web ...
3
votes
3answers
396 views

Regarding separate a single file into multiple files according to line separation

Currently, I have a plain text file, A, such as lowest priority very high significance. outstanding very novel In this file, every line contains a sentence. I want to separate this file into ...
5
votes
3answers
4k views

Understanding character device (or character special) files

I am trying to understand character special files. From wikipedia, I understand that these files "provide an interface" for devices that transmit data one character at a time. My understanding is ...
1
vote
1answer
179 views

How to get a list all the “aliases” of a file (including of type directory) efficiently?

How can one get the list of all the aliases of a file (including of type directory) efficiently, given that a file: may have multiple hard links, multipe soft links, multi-level soft links may be ...
2
votes
2answers
887 views

How can I get entries for a given time period from a 400MB+ log file?

I have a 400MB+ Tomcat log file (catalina.out). How can I pull out entries for a given time period?
7
votes
3answers
15k views

How do I remove multiple files with a common prefix and suffix?

I have many files named sequence_1_0001.jpg sequence_1_0002.jpg sequence_1_0003.jpg ... and files named sequence_1_0001.hmf sequence_1_0002.hmf sequence_1_0003.hmf ... and files ...
27
votes
12answers
43k views

Efficiently delete large directory containing thousands of files

We have an issue with a folder becoming unwieldy with hundreds of thousands of tiny files. There are so many files that performing rm -rf returns an error and instead what we need to do is something ...
12
votes
4answers
938 views

Drop a specific file from the Linux filesystem cache?

I know I can drop everything from the Linux filesystem cache, but is there a way to drop just one specific file? Or prevent a file from being cached? Or tell a process not to cache any files it ...
7
votes
1answer
325 views

How can I split Openbox `rc.xml` into multiple files?

I don't like big text configuration files. So, I would like to split my rc.xml file into multiple files: rc.xml rc.keyboard.xml rc.mouse.xml
1
vote
0answers
164 views

Editing images with sips doesn't work without being executed directly from Terminal? [closed]

I made a cheesy application with a bash script using CocoaDialog, and within this application I need to modify the size of a photo. So, I researched a little and found the sips command; and it works ...
3
votes
2answers
5k views

Move huge number of files into date structured directory order

I have about 1 million files in this directory: /home/username/images/ Each of the files are called something like: 012345678910(Place)_0_20120414185957_28841.jpg with the timestamp part of the ...
2
votes
1answer
53 views

Writing To Disk Before Install

I burned Pinguy to a disk, and loaded the disk. If I create files, then save them, but don't install Pinguy, and then take out the disk, will those files be gone the next time I boot from the disk, or ...
21
votes
4answers
9k 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
342 views

Why the inode value of shadow file changes?

I created a hard link for the shadow file. For removing the passwd of the user I opened the shadow file in vi editor and removed the encrypted passwd and then saved. The inode value of the shadow file ...
2
votes
2answers
228 views

Is there a way to undo the 'cpp' command in terminal?

I accidentally typed cpp Scriptname.py DestinationDirectory, intending to copy the Python script into the folder. I realized afterward that I should have used cp, but now my Python script is ...
5
votes
3answers
7k views

How can I change 'change' date of file?

How can I change 'change' date? $ touch -t 9901010000 test;stat test File: `test' Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: fe01h/65025d Inode: 11279017 ...
7
votes
8answers
3k views

Bash, remove oldest files

I`m trying to delete old files from directory and leave only 3 newest files. cd /home/user1/test while [ `ls -lAR | grep ^- | wc -l` < 3 ] ; do rm `ls -t1 /home/user/test | tail -1` ...
1
vote
3answers
7k views

Giving PHP permission to write to files and folders

UPDATED FOR FURTHER CLARITY: According to http://expressionengine.com/user_guide/installation/installation.html, it says: For most Unix hosts the following is typical, but you may check with your ...
4
votes
1answer
695 views

Restoring an open file

I have an interesting problem which may or may not have a solution but I'd love to have one if possible: On Solaris an open log file has been removed, which still continues to be populated while the ...
1
vote
3answers
4k views

Opening files from Ubuntu server over ssh from Mac Terminal

So I SSH into a Ubuntu server and try to open the file in a Mac program (Coda) and get an error: Couldn't get a file descriptor referring to the console Using the command open myfile.html This ...
2
votes
3answers
652 views

Can I list only specific subdirectories?

I have a folder tree structure like arndell \_databases \_daily \_weekly claremont \_databases \_daily \_weekly monte \_databases \_daily \_weekly and I am only after all files inside ...
2
votes
4answers
855 views

Editing a file without overwrite permission

Is it possible to set permissions for file to keep it editable but without permission to overwrite? I mean possibility to edit the file with text editor, but denying any attempt to replace the file ...
4
votes
3answers
556 views

Why is there a type for process ids (pid_t), but not for file descriptors (fd)?

I see that pid_t is typedef'd in unistd.h, and file descriptors are defined to be int in fcntl.h. But since they are used in similar ways, wouldn't it make sense to have a typedef for file ...
13
votes
1answer
8k views

ls taking long time in small directory

Running Ubuntu, I open a terminal and do sudo bash cd / ls | head -n 1000 And predictably about 20 directories are returned. However, if I do an ls, and don't pipe it into anything, the ls just ...
9
votes
3answers
8k 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?
4
votes
1answer
2k views

Replace variable read from a text file (so they can be interpreted)

I tried several stuff with not luck so maybe one of you experts can help me (I hope!). I want to store in a text file some select statement that contain variables like a date: $ cat res.txt select ...
2
votes
0answers
189 views

Disk filename corruption

Using QNX unix filesystem. The files once written with good file names in a good directory and partition get corrupted in their filenames. Some of the files remain in good shape in the same ...
0
votes
1answer
84 views

Looking for resources: like C doc for reading files and their attributes? (On Linux)

Looking for resources: like C doc (something like JavaDoc for C on Linux would be cool) for reading files and their attributes? I'm working on recursively reading in files. I can get a list of files ...
5
votes
1answer
321 views

How to replace a symbolic link with an equivalent hard link?

Having a (single, no batch filesystem processing needed) symlink, what a command line to use to turn it into a hard link to the same file?
8
votes
2answers
2k views

How to replace a symbolic link with a copy of a file it links to?

Having a (single, no batch filesystem processing needed) symlink, what a command line to use to replace it with a copy of the file it links to?
0
votes
1answer
110 views

Is there an application to find similar documents?

Is there any good software that finds groups of multiple files that are similar, or where one file includes a part of another? I have a directory with lots of files mixed up. Among the files, are ...
3
votes
1answer
446 views

Redirecting/grep'ing an existing shell's STDOUT

I run a lot of long running processes (simulations) that print progress to STDOUT. I occasionally forget to redirect to STDOUT to a file I can grep, and it's usually too far along to restart. ...
2
votes
5answers
593 views

Is it possible to reference the most recently modified file in a command line argument?

I frequently download PDF files with heinous numeric file names from my browser. These automatically go into ~/Downloads. Ideally I would like to just be able to open these files with: evince "the ...
2
votes
3answers
2k views

How to remove an empty directory (btrfs filesystem)?

I'm using the experimental btrfs filesystem. My directory looks like this: ls -la empytfolder total 4 drwxr-xr-x 1 root root 0 19. Mär 14:00 . drwxr-xr-x 1 root root 298 19. Mär 13:59 .. I ...
10
votes
4answers
5k 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 ...
1
vote
1answer
196 views

Listing specific lines in listed files

Find all files in /tmp that are ordinary files and print the lines that end with Programming. For this problem I know how to list all files in /tmp. What I do not know how to do is whether to use ...
3
votes
1answer
756 views

Is there a way to view a list of timestamp history of a document/file via terminal/command line?

This seems like it's simple but for some reason, it's not: Problem: I've been writing a paper- not even a script...just an economics paper- over the last 3 months. I'm trying to determine how much ...
4
votes
2answers
4k views

How to execute one command on all files within a folder

Saying, I have this tree and I want to execute ruby on all scripts within the folder. How could I archive through one line of command. ./ ../ rb-script/ sample1.rb sample2.rb
4
votes
2answers
10k views

List of Recently Modified Files

How can I Get a list of all files modified , say 3 months ago. I checked this question but I was not able to apply it to my scenario. I am trying this now , it seems to be working , but I know there ...
12
votes
2answers
2k views

“ls -lh” reports total size less than sum of individual sizes

Under what circumstances would ls -lh show a total that is less than the sum of the individual files? For example: $ ls -lh /var/lib/nova/instances/_base total 100G -rw-rw-r-- 1 nova nova ...
1
vote
2answers
4k views

How to write a file at various offsets to a filesystem partition with dd command

Requirement I want to write a file at various offsets into the partition Partition /dev/part2 is mounted at /mypart I tried the command below: dd if=/dev/urandom of=/mypart/aaa bs=1024 seek=0 ...
6
votes
2answers
14k views

Unable to delete file, even as root

I've got a file on remote machine (saying that, cause I don't know who the heck created it), that I've to remove. user@machine:~/folder$ ls lift_proto.db.lock.db And permissions are like this: ...
5
votes
4answers
10k views

What is the max partition supported in linux?

May i know the max partition size supported by an Linux system. And how much logical and primary Partition as we can create in an disk installed by linux system?
2
votes
2answers
776 views

How do I output a count of all files with “tty” in the filename in the Linux directory that holds files on system devices

I am having trouble knowing how to output a count of all files with “tty” in the filename in the Linux directory that holds files on system devices.
1
vote
1answer
94 views

Command to list in real time all the actions of a process

I cannot remember this command (and googling was unsuccessful), but there is a way to get the list of actions performed by a process, that outputs something like # listprocessactions -p 1234 ...
2
votes
3answers
8k views

Run sudo as another non-root user and save in this user's home directory

I added a new group: ircuser and a new user: ircuser In visudo I placed this line: myuser localhost=(ircuser) NOPASSWD: /usr/bin/irssi Created ircuser directory, where config files, caches, etc ...
5
votes
2answers
1k views

How to grep on source code without catching comments

I search a way to grep on source code without having sometimes false-positive because of comments. For instance if I search on foo on this .c source code : /* * foo has changed [...] and is now a ...