Logical entities that contain data in a filesystem. Use this tag if your question: is about programs that create files (e.g. gzip, tar, zip); deals with characteristics of files (permissions, size, path/location); or is about management of files (renaming, listing, moving, removing). For operating ...

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3
votes
1answer
122 views

move the search content to different directory

I am on Oracle Solaris. I am using: grep "searchstring" filename.* above command returns my search result. Now I want to move the all the files in above search result (all the files not the ...
3
votes
1answer
61 views

Can't create a+r file

Using Debian I am unable to create files that by default has read permission for all users. For example: # umask 0002 # touch test # ls -l test -rw-rw----+ 1 user user 0 Jun 25 18:18 test Is there ...
1
vote
2answers
1k 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 ...
2
votes
1answer
552 views

Set file creation date to its modification date on OSX

I need to batch edit file creation date (some stupid audio recorder set the file creation date to UNIX epoch and the correct recording date in the modification date) to set it to the files ...
6
votes
1answer
2k views

Monitoring filesystem activity

Say, I have a program, and I want to monitor its filesystem activity (what files/directories are created/modified/deleted etc.) This program may be capable of spawning further processes, and thus, I ...
4
votes
2answers
505 views

Comparing files in unix columnwise

I want to compare two files with same number of rows and columns with records in same order. Just want to highlight the differences in the column values if any. file A: 1,kolkata,19,ab ...
6
votes
4answers
8k views

Redirecting Output of print to multiples files in awk

I want to print same lines to 2 different files. What I am doing right now is: print ID[i]" "Value[i]" "TS1[i]" "TS2[i] > "file1.txt"; print ID[i]" "Value[i]" "TS1[i]" "TS2[i] > "file2.txt"; ...
6
votes
2answers
6k views

“no such file or directory” message when deleting a file that exists on NTFS

I have a directory with images. Suddenly I found out that there's a new image with a new name. The image content is similar to another image in another directory but with a different name. I didn't ...
5
votes
3answers
3k views

How is it possible to do a live update while a program is running?

I wonder how killer applications such as Thunderbird or Firefox can be updated via the system's package manager while they are still running. What happens with the old code while they are being ...
3
votes
1answer
301 views

Compose and pipe a gzipped tar archive in one go

I'm trying to come up with an effective way to create a gzipped archive of various system partitions on Android, piping everything out to stdout so as to be able to encrypt it as it comes across via ...
2
votes
3answers
396 views

File ID that doesn't change upon rename

I am trying to write a system utility script that will run as a cron job and capture file system statistics and environment settings in order to track as many changes as possible. Consider the ...
4
votes
1answer
5k views

Minimum file permissions to delete a file [duplicate]

To delete a file in Linux: What minimal permissions do we need to set on it? What minimal permissions do we need to set on its parent directory?
2
votes
3answers
1k views

User permissions problem Linux

Every time I create a new file from "eclipse", I need to run these two lines of code to get the r/w permission: chmod -R 775 /var/www/folder/filename.extension And/Or sudo chown -R ...
0
votes
1answer
264 views

How do I cat a command file?

I have the output of the crontab -l stored in a file (crontab_file) with no extension. But whenever I try to cat it, I get errors saying command not found for multiple line of the file. Here is the ...
4
votes
3answers
799 views

Find files in directory with paired names

I'm running tests of a variable-size-and-contents test set. Data files are added and removed frequently. I'm looking for an automated way of gathering a file list. All files are in subdirectories of ...
4
votes
3answers
232 views

zsh's “echo SomeText >> **/filename” in other shells

I need to fill all files with a specific filename (recursively) with a text. In zsh this can be done with echo SomeText > **/TheFileName I search generic solutions for sh-compatible and/or tcsh ...
0
votes
3answers
196 views

Looping the listing files in UNIX

I've given the command: ls -lrt and the listed files and directories are: drwxr-xr-x 4 root root 4096 Feb 2 2014 abc drwxr-xr-x 4 root root 4096 Feb 2 2014 cde drwxr-xr-x 4 root ...
3
votes
4answers
7k 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 ...
3
votes
1answer
788 views

Protecting data against bit rot

I have realized that I need to protect all of my photographs against bit rot (file corruption occurring at random due to errors in hard drives or network transfer). I recently discovered par2 which ...
1
vote
1answer
144 views

Mount a file collection in a linux environment

I am presently working as a summer intern. My first objective is, given a collection of files, recover and identify the file types present in it. To download sample pseudo-forensics data I have been ...
11
votes
2answers
47k views

Cron job to delete files older than 3 days

I need to remove files older than 3 days with a cron job in 3 different directories. (these 3 directories are children of a parent directory /a/b/c/1 & /a/b/c/2 & /a/b/c/3) Can this be done ...
1
vote
2answers
270 views

Copying the newest files

We have a script running which picks up the report generated monthly on remote servers. I was trying to find a way to pick up the latest file from the remote servers only. Will find work in script ...
2
votes
1answer
118 views

updatedb for a beginner

The updatedb command, as I understand it, is basically the utility that keeps the mlocate.db database file updated. And it's a good idea to keep it updated regularly. For that matter, I've kept a ...
11
votes
1answer
514 views

How is file owner and group remembered for an external drive?

I formatted an external hard drive with an ext4 partition and subsequently mounted it. So that I could use the new partition, I did: sudo chown me:me /mount/directory to change the file owner and ...
3
votes
3answers
173 views

Moving an open file to a different device

I have an application running that is generating a large (~200GB) output file, and takes about 35 hours to run (currently I'm about 12 hours in). The application just opens the file once then keeps it ...
5
votes
3answers
613 views

Bash: Zipping/grouping files by common substring

I have about 100 files. They are named like this. 3000_ABCD_XXXXXXX.csv 3000_ABCD_YYYYYYY.csv 3000_ABCD_XYXYZYZ.csv 3000_EFGH_XXXXXXX.csv 3000_EFGH_YYYYYYY.csv 3000_EFGH_XYXYZYZ.csv ...
3
votes
2answers
662 views

Error when calling mv with wildcards

#! /bin/bash error_text=$(tail -n +1 /path/dir/folder/exc/a/update/Abd/ER/* | \ grep 'Warning\|Loaded\|Event') echo $error_text nc 10.10.99.45 25 << EOF ehlo mail.abc.pvt mail from: ...
0
votes
1answer
357 views

setfacl remove all write access

I want to remove all write access to files & directories for any user or group while preserving other permissions. Is this possible?
12
votes
3answers
466 views

How to check whether file1 is a prefix of file2?

I have two files with sizes 124665 and 124858 in bytes and want to check whether file1 is a prefix of file2 or not.
6
votes
2answers
7k views

Is there a command line method by which I can check whether a downloaded file is complete or broken?

I'm writing a script that involves downloading and manipulating a file, and I want to ensure that the file is not incomplete (due to e.g. a dropped connection) before I work on it.
1
vote
1answer
36 views

console (driver) not opening using any of the editor

In my initramfs, I have; [root@xilinx Peta_Microzed_15_05]# ls initramfs/dev/ console [root@xilinx Peta_Microzed_15_05]# nano initramfs/dev/console [root@xilinx Peta_Microzed_15_05]# The above ...
1
vote
2answers
245 views

Sort files into directories named by prefix of file

I have a bunch of files like this 5830_1.png 5830_2.png 5830_3.png 5831_1.png 5832_1.png 5832_2.png I'd like to sort these files all into directories that take the prefix of the file name as the ...
4
votes
4answers
1k views

What is the Linux command to display how many file names in the directory end in two digits

What is the Linux command to display how many file names in the directory end in two digits? Using ls with a command like this : ls -l | wc –l *[0-9][0-9]
0
votes
2answers
2k views

using inotify to monitor access to a file

I would like to have a trigger and when a particular file is accessed by some process, I would like to be notified (i.e. a script should be run). If I understand correctly, this could be achieved with ...
0
votes
2answers
550 views

Linux - Delete last two files automatically

In Linux, one folder is created every morning and 5 files are created in that folder. At the end of the day (Midnight), the last two files in that folder have to be deleted. How can I accomplish ...
5
votes
3answers
1k views

Linux command to return all files that start with TEMP but do not end with double digits

What is the Linux command to return all files that start with TEMP but do not end with double digits? I think it should look something like this: ls -l TEMP*[!0-9][!0-9] but the results of my ...
3
votes
5answers
557 views

Look if a folder has some files with certain extensions

Suppose I have a file structure: $ cd /home/Desktop $ ls -d */ Abc/ Qwe/ Zxc/ Rty/ $ Now I want to iterate through every directory and see if they have any ".pdf" files. Could some one please ...
1
vote
1answer
233 views

Why won't my system now show the directories and files in /media/sda7?

Summary: Could you tell me please if there is a way to restore the directories and files beneath /media/sda7 that are no longer being shown by my file manager or ls? My system is Debian. Full ...
5
votes
3answers
2k views

Precedence of user and group owner in file permissions

I just ran into something unexpected (for me) regarding file permissions on Linux (Arch Linux). Basically I have: userX in groupX fileX userX:groupX ---rwx---- What puzzles me: I cannot perform ...
0
votes
1answer
2k views

How do I create a RAM disk on Linux Mint?

I am running a package that adds data to the end of 140–300 files each time through the process. I'm thinking of moving the process to a RAM disk, and using rsync to copy it back when done. My goal ...
1
vote
2answers
3k views

Shell script to Capture the file name and size in csv file and add header on that file

I have a number of zip files in a certain folder. I want to capture file name and the size of the files in a CSV format in day wise and put it in crontab so I can report on a daily basis, and then ...
6
votes
4answers
1k views

Check if a folder has a certain type of file present

How could I check if a file has a file of extension .java? So far I have: for javaFile in *.java ; do { echo "The file $javaFile has : " >> ~/Desktop/externalServers.txt ...
3
votes
1answer
8k views

Transfer files from CentOS VM VirtualBox to Windows host machine

How can I transfer the scripts and text files I've created in my CentOS environment and put it in my host desktop (Windows 7)? I've tried using ftp but it needs to configure the routers to use vsftpd, ...
2
votes
2answers
1k views

Any way in Bash to write to a file every X seconds without closing it?

The hardware watchdog on my system needs a 0 written to /dev/watchdog at less than 60 seconds interval or it will fire. The file handle must be kept open however or the watchdog is then disabled. ...
6
votes
2answers
486 views

How to backup dir structure ignoring files & dirs without read permission

Any ideas how to back up a directory structure for which there are some files and/or directories for which you do not have permission to read? I'd like to just ignore those, without backup (tar? jar?) ...
3
votes
1answer
79 views

what is the original command to create a file? [closed]

we can create a file by a lot of commands: cat > foo.txt echo 'This is a test' > foo.txt touch foo.txt vi foo.txt (or any text-editor) my questions are: What is the original command to ...
3
votes
2answers
849 views

Read all files in folder and subfolders - progress and size

Command I have is: time find . -type f -print -exec cp {} /dev/null \; This command finds all files in current folder and subfolders, print the name of each file and copy each of them to /dev/null. ...
1
vote
1answer
126 views

Emacs, complete list of color “keys”

If you want to customize the colors in Emacs, specifying them in the .emacs init file, without installing any extra package, and without using a pre-made theme, something like this seems to work: ...
3
votes
2answers
1k views

inotifywait different action on file or dir

I'm trying to make a inotifywait script take different actions for files vs folders if it sees a close_write flag being raised in the watched directory, but cannot seem to get the checks working. In ...
1
vote
2answers
50 views

List of files accessed by application

I want to install propertiary AMD driver but I would also like to know which files were created/changed by installer. Is there some application which can observe (probably by inotify) which files were ...