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

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5
votes
1answer
351 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?
10
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
113 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
466 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. ...
3
votes
5answers
761 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 ...
3
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 ...
11
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
216 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
923 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 ...
5
votes
2answers
5k 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
5
votes
3answers
14k 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
5k 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
17k 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
12k 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
1k 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
99 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 ...
3
votes
3answers
9k 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 ...
6
votes
2answers
2k 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 ...
3
votes
3answers
4k views

process files in a directory as they appear [duplicate]

Possible Duplicate: How to run a command when a directory's contents are updated? I'm trying to write a simple etl process that would look for files in a directory each minute, and if ...
6
votes
3answers
1k views

Best way to swap filenames

I need to swap filenames of two files (file and file_1). I'm using the following code for it. mv file .phfile mv file_1 file mv .phfile file This works but is very buggy, It sometimes even results ...
3
votes
2answers
2k views

Tar overwrites read only files

I created directory test, created file 1.txt in test, wrote 'Before' in this file. Then I went cd .. and used the command: tar -cvzf ./test.tgz ./test Then I entered the test dir again. Opened ...
4
votes
2answers
209 views

System files with strict permissions

Usually, when we run ls -l we can see such picture -rwx...- so the owner always has the full stack of permissions. And usually the owner of the system files is the root. Are there any system files ...
2
votes
1answer
253 views

How are Flash Videos played?

I was tweaking around with a script for playing Youtube playlists in mplayer. My question is: How does linux play flash videos? My current research yields (By reading scripts written by others): ...
0
votes
2answers
1k views

How to calculate in linux number of file inside nested directories?

I need to extract information how much files are in some directory tree: /.../testRoot/test1/test11/..../file1 /.../testRoot/test1/test11/file2 /.../testRoot/test1/test11/..../file3 ...
4
votes
1answer
486 views

Renaming files from bash in linux

There is a bunch of files of the following format hh-mm-ss.png where hh, mm, ss are hour, minute and second. How can I rename all these files in the directory in a sequential way from 1.png til n.png ...
1
vote
1answer
226 views

How can I monitor if anybody (any process) access is certain file [duplicate]

Possible Duplicate: Access history of a file I know if a file is "being accessed" I can use lsof to see who (which process) is accessing it, but lsof is slow and heavy and I don't think I ...
3
votes
2answers
2k views

Concatenate specific files into one single file

In a folder containing X files, I need to concatenate Y files (where X > Y) together into a single text file. I have the filenames (of Y files) that I need to concatenate. Can anyone please help me ...
18
votes
5answers
32k views

File extensions for unix shell scripts

On wikipedia, the article for .sh says: For the .sh file extension type, see Bourne shell. How about other unix shells? I know that the shebang is used inside the file to indicate an ...
7
votes
2answers
5k views

How to find out which file is currently written by a process

My situation is that from time to time a specific process (in this case, it's Thunderbird) doesn't react to user input for a minute or so. I found out using iotop that during this time, it writes ...
11
votes
2answers
284 views

How to start tailing a file that has not been yet created

I use tail to monitor the progress of jobs that I know will write their progress to disk. Almost always, I know which file they will create before they start running (the jobs are dispatched by a ...
3
votes
3answers
2k views

In Mac OS X Snow Leopard, how can one file's permissions be matched to another?

I need to make the permissions of a file exactly match the permissions of another file in OS X 10.6. I don't see 'getfacl' or 'setfacl' as suggested in some other posts for Linux. And, it doesn't ...
8
votes
1answer
2k views

gvim -p limit of opened tabs?

When I run : gvim -p *.xyz I find that not all files are opened in tabs. It feels, like a kind of tab limit? But ! When I try to open unopened with : :tabnew it is opened next to previous ...
5
votes
1answer
5k views

mv file without write permission to the source file

I just realised that I can move a file that I do not own and don't have write permissions on. I have write permissions to the directory, so I am guessing that is why I could move it, but in this ...
51
votes
6answers
36k 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 ...
3
votes
2answers
2k views

How to add/replace only modified/updated files recursively for some 2 folders?

So I currently do stuff like: rm -rf ../../../$CLOUD_INSTALL_SUBDIR/lib_boost mkdir ../../../$CLOUD_INSTALL_SUBDIR/lib_boost cp -r ../../../$BOOST_ROOT_DIR/$BOOST_INSTALL_SUBDIR/lib/* ...
2
votes
2answers
190 views

Index names of all the files in a plain text file

I've got this directory full of images, and I can do this: echo *.jpg image1.jpg image2.jpg image3.jpg # and so on How can I get the output in a plain text file in this format? image1.jpg ...
5
votes
1answer
5k views

bash force copy over same file

Our sysadmin has created a backup system that creates snapshots of the hard drive. When I try to restore an older version from the snapshot: cp /path/to/snapshots/foo.bar /path/to/folder/foo.bar ...
17
votes
6answers
12k 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 ...
8
votes
2answers
5k views

Group member cannot write even with write permission

The logged in user is a member of a group that has a write permission on a folder. But when this user is trying to write something, "permission is denied". The log below summarizes the question: ...
22
votes
4answers
32k views

How can I find out how many lines a text file contains without viewing it?

How can I find how many lines a text file contains without opening the file in an editor or a viewer application? Is there a handy Unix console command to see the number?
18
votes
5answers
13k 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?
5
votes
2answers
409 views

Can I move a directory with open files?

Imagine a bunch of processes using a /home/user/logs directory. They have some logs open for a longer time.
3
votes
2answers
772 views

Subtracting Binary files

I have 2 Binary Files FileA and FileC Its is such that FileC = FileA + FileB using the cat utility How do I subtract FileA from FileC to get FileB ? PS: I am using Ubuntu Oneiric
3
votes
3answers
2k views

Obtain .avi file info from command line

What is the best way to obtain information as bitrate, framerate, width/height of an movie file (in my case .avi) from the command line? I am looking for a basic tool that works similarly as ...
2
votes
3answers
5k views

How to delete the oldest directory in a given directory? [duplicate]

Possible Duplicate: Shell script for moving oldest files? I have a backup directory that stores x other directories that require backuping. I need something that will run before another ...
3
votes
1answer
154 views

lstat64 fails on existing directory

After trying for a while to debug a failing move_uploaded_file call, I tried strace -s 8192 -o strace.log -f /etc/init.d/apache22 restart This produced, among a lot more output, the following ...
2
votes
3answers
777 views

Is there a way to tell the system to keep a folder to reside in memory?

I'm developing a Java EE web application and I'm trying to speed up the testing process. To do so I was wondering if there is a way to tell the system to keep my build folder in system memory?
2
votes
2answers
3k views

How can I selectively copy files from one directory to another directory?

On Linux, how do I selectively copy most – but not all – files from a directory (dir1) to another directory (dir2)? I do not want to copy *.c and *.txt files to dir2. The cp man page ...
3
votes
1answer
1k views

Access to the files beyond Wine's virtual disks

I'm totally new to Linux. I would like to know if the executables run through Wine have any access beyond the virtual drives provided by Wine (e.g. C:/, D:/)?