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

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1
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2answers
38 views

Read the file from one Unix server to the other Unix server

I have a Pro*C program which I run on Unix server a but the input file required for this program is on other Unix server b. Whenever I run I have to copy the file from server b to a. Is there any way ...
0
votes
2answers
35 views

Precaching the list of files of the filesystem

I was wondering where and in what form a list of files and directories is stored on the ext4 filesystem. The problem is that whenever I try to access a certain directory for the first time since boot ...
-1
votes
2answers
46 views

Extracting certain data within a script output file

We have a script that runs several commands and rolls up all the output and inserts in into a log file. One of the commands it runs is "netstat -anp". I'd like to be able to search this file for all ...
1
vote
2answers
165 views

How would I use sed or awk to extract certain lines in a file

If I wanted to search for all lines in a file that start with a date, such as "May 1", how would I do that with sed or awk? I need to extract this data and either send to screen or a file. Thanks.
0
votes
2answers
51 views

Find command returning wrong data [duplicate]

I am using this command to list all files that have been modified in the last day (or created) find ./ -mtime 1 -ls However it keeps returning files from 30th April when I am running the command ...
3
votes
3answers
61 views

Create many files with random content

I am looking for a command to create multiple (thousands of) files containing at least 1KB of random data. For example, Name size file1.01 2K file2.02 3K file3.03 5K ...
2
votes
2answers
93 views

List files recursively in Linux CLI with path relative to the current directory, max 250 char

I'm trying to list all the files with names no longer than 250 characters (including the directory it is part of, from the relative path my command is inside). I've seen a similar thread , but that ...
0
votes
0answers
31 views

Regex for a non-fixed pattern

I am trying to come up with the right regex (compatible with python) that would match a file that contained sample input as follows: On the third day of Christmas my true love sent to me: three ...
5
votes
2answers
208 views

What are .serverauth.##### files in my home directory?

The files are .serverauth.##### where ##### is a 5-digit number. I have a handful of these files in my home directory with a broad range of creation dates spanning a couple of years. What are these ...
0
votes
1answer
31 views

Incrontab / Incron on Cygwin

Does anyone please know if it is possible to install incron/incrontab within Cygwin? I've had a look and the package does not appear on the cygwin website, I wondered if anyone had tried, knew of any ...
1
vote
2answers
117 views

Why is there a file called [ in my /usr/bin directory? [duplicate]

Recently back to Linux from another operating system I noticed a file called [ which seems strange to me. What is it for? $ ls -l /usr/bin | head -2 -rwxr-xr-x 1 root root 39552 Nov 3 14:44 [ ...
0
votes
1answer
31 views

How to fix ntfs file problem when there is now windows?

I have a "stubborn" file on an NTFS partition which refuses to be deleted. A little background on the problem... Problem happened when I was running Zim on my Linux and the system froze due to some ...
1
vote
1answer
118 views

What is this file: .readahead doing in my root directory?

When I do: ls -a / on Fedora 21 there is a hidden file named: .readahead and it's 104092k What is this file?.... is it suppose to be there? I found this on google: readahead system call on ...
1
vote
2answers
50 views

How do I get a count of file references inside a folder of files with those references?

Alright, I have two folders. For simplicity's sake, I'll call them people and animals. The animals folder has a file for each animal, and the people folder has a file for each person with references ...
2
votes
1answer
161 views

How can I check if rsync made any changes in bash?

I have a script which uses rsync to sync data in a remote -> local scenario. Immediately after the rsync command is run, a check to see if the error code equals zero or not. If its zero, further ...
8
votes
1answer
265 views

What three files are always opened by a process?

Someone mentioned that there are three different files that a process always opens. What does this mean? What files are they?
0
votes
1answer
52 views

command “find … -exec mv …” created a file with strange content

I wanted to move binary files from folder /myhome/sourcedir to /myhome/targetdir. I used a command find /myhome/sourcedir -type f -cmin +3 -exec mv '{}' /myhome/targetdir ';' Folder /myhome/sourcedir ...
2
votes
1answer
50 views

Using wget, how to download to a specific location, without creating folders, and always overwrite original files

How do I use wget to download files to a specific location, without creating directories, and overwrite the original every time. I've tried using the -r -P and nc options in combination but this ...
0
votes
1answer
36 views

Understanding syslog rotation, to implement own syslog rotation

I am trying to implement a simple syslog server (UDP based). On this , we are trying to implment SYSLOG rotation feature. Currently the roatation of logs is done by rename C API. By doing this we ...
0
votes
1answer
50 views

How do I copy all files that have been created or modified in the last 12 months?

I would like to copy all the files created in the last 12 months to a new folder leaving behind everything else. Including sub folders.
0
votes
1answer
152 views

What is the file type “raw G3 data, byte-padded”

I ran $ find ~/ |xargs file|grep -i -e SQLite just to understand what programs use sqlite. I started seeing lines like /home/alord/hg/cpython/.hg/store/data/_modules/__sqlite/cursor.c.i: raw G3 ...
3
votes
2answers
71 views

List direct symbolic links (links that don't point to another symlink)

I need to make a list of all direct symbolic links in a directory, i.e. symbolic links that point to another file which is not a symbolic link. I tried to do it this way: for i in $(ls -1A); do ...
1
vote
1answer
156 views

ext4 disk space not reclaimed after deleting files

I recently got a "device full" warning for a 2 Tb external ext4 drive. I deleted a bunch of files, about 90-100 Gb of old system backups, and since I did not want to empty all trash, I deleted the ...
1
vote
2answers
33 views

How to check if a group of files is readable?

I have to check if a group of files is readable. I know how I would go about checking one file by using [ -r file.txt ], but how would I go about writing a loop that would check multiple files ...
-3
votes
3answers
84 views

Delete line from files

I have 8 files in a folder. If any of these files has 2 lines I need to remove the second line from that file. If a file has more than 2 lines then then I do not need to do anything to it. Can anyone ...
1
vote
1answer
78 views

Sticky bit and users with sudo permission

Let's say I chmod 1777 a folder /opt/test and all files inside it as user user1. Hence user2 is able to update and edit files inside the /opt/test directory. When user2 operates via sudo, he's able ...
14
votes
5answers
1k views

How is a directory a “special type of file”?

I am reading this Unix tutorial and came across this quote... We should note here that a directory is merely a special type of file. ...but no explanation or details are provided. How is a ...
1
vote
1answer
19 views

Map Home to External Drive

Whereas I have my OS (in this case, Elementary OS Freya) installed on my non-partitioned internal hard drive, I have an external hard drive with /Documents, /Downloads, /Movies etc. where I store all ...
7
votes
2answers
350 views

How to store a large folder in a single file without compression

Sorry if this is a stupid question, but I want to take a 78gb folder and store it in a single file (for upload into a cloud service), as if I am compressing it in an archive, but I don't want any ...
3
votes
3answers
135 views

Remove passphrase from private key and set specific file mode

If I set a passphrase on my private key like so: openssl rsa -des -in insecure.key -out secure.key and I remove the passphrase like so: openssl rsa -in secure.key -out insecure.key then my ...
1
vote
1answer
18 views

File with a no-atime-updates “A” attribute still updates atime. Why?

$ stat file_1 | tail -n 4 Access: 2015-04-16 21:48:42.675095130 +0200 Modify: 2015-04-16 21:48:42.675095130 +0200 Change: 2015-04-16 21:51:31.844300132 +0200 Birth: - $ lsattr ...
2
votes
1answer
68 views

How to split file and save parts to multiple locations?

How do I split a large file into multiple smaller chunks and write each part of it into separate locations? split command seems to only output all the files into one location. The context I need to ...
-1
votes
1answer
55 views

How to remove duplicate lines from file? [duplicate]

I have file for example 'a' aaa aaa bbb ccc ccc bbb ddd After executing uniq a c i get file 'c' aaa bbb ccc bbb ddd How to delete duplicate bbb lines?
1
vote
1answer
46 views

File corruption using rsync, multiple rsync processes, moved/renamed source file

I'm encountering some file corruption when using rsync (that is, the file contents do not match the source file). I can understand the file becoming corrupt if it is being written to while being ...
4
votes
1answer
70 views

Find the files between two folder dates in linux?

I need to find the folder names along with the file names which has my string in their contents. I am in this directory "/data/queue/data" and I have lot of folders in the same directory and inside ...
1
vote
1answer
29 views

How to undo and revert an accidental `7z e`

I accidentally typed 7z e archive.7z and all the files ended up in my home directory when I wanted to extract them in a subfolder. How can I clean the mess and remove all those files?
3
votes
4answers
585 views

Is is possible to modify a file in a read only directory? [duplicate]

I have already read: Is there a way to modify a file in-place? I am curious if there is a way to modify a file in place using a command that will not create temporary files. Let's say I create a ...
0
votes
1answer
44 views

enable to write to file inspite we remove all file permissions

something isn’t clearly for me when I remove all permissions from file as chmod 000 I expected to get permissions denied when I write to file but still I can write to file as the following example can ...
2
votes
2answers
95 views

Make rsync move (not copy) files on local file system

Can I make rsync to move large amount of files instead of copying them when on local filesystem? I would like it to behave like improved mv command. I know about --remove-source-files option but ...
3
votes
3answers
127 views

remove all instances of _000 from multiple files

Had to recover my music library from a HDD which died.... got everything I wanted but all music track names have _000 added at the end. I really don't fancy going through 8000 individual music tracks ...
0
votes
0answers
40 views

Tar corrupting file attributes and skipping directories

While creating tar archives for backup purposes with 'large' numbers of files (200+), I have been repeatedly running into the following errors: tar: some/path/file.xyz: Cannot stat: Invalid argument ...
0
votes
1answer
117 views

Is there a way to use sed or awk to filter data inside a zipped file? [duplicate]

Is there a way to use sed or awk to filter data inside a zipped file? When I run a sed or awk command and send to stdout the file created is 0 bytes.
0
votes
3answers
82 views

copy the contents of a variable in a text file

I know this is a stupid question but I want to know how I can put the contents of a variable in a text file. This variable is a string that I want the code with the base64 command.But this command ...
3
votes
1answer
210 views

How can I see a file's historical modification times? [duplicate]

stat outputs a file's last modification time. How can I see a list of all the times a file was modified? For example, I'd like to edit a file 5 times, and see 5 modification times.
4
votes
5answers
364 views

Script tries to create files even though it shouldn't have to?

I have a folder which contains some folders, these folder are moved very often so I made a script to see if they exist, and if not then create them. This is what I did to (which I though would) ...
1
vote
2answers
691 views

Delete files older than X days +

I have found the command to delete files older than 5 days in a folder find /path/to/files* -mtime +5 -exec rm {} \; But how do I also do this for subdirectories in that folder?
1
vote
1answer
52 views

How to copy a directory with only specified type of files?

I got a git directory with plenty of python files(and some special file like .git). I'd like to copy only these python files to another directory with the directory structure unchanged. How to do ...
4
votes
4answers
72 views

Traverse, copy & transform file names

My issue: I need to copy log files, all with identical names, but stored 1-deep in subdirectories, and change their names. I'm copying from the a folder called Logfiles which contains a bunch of ...
0
votes
0answers
45 views

Directories and files changed to unknown type [duplicate]

After breaking my Debian jessie system with the mistyped command: # chmod -R 0644 / now I am using a live CD to backup my data but all the files and directories are of unknown type now and ...
-1
votes
1answer
59 views

Generate a tarball or (.tar.gz) of the recently modified files in the directory

As the title says, I need help creating a linux script that generates a tarball or (.tar.gz) of all the files in the directory passed in as an argument to the script and have been modified in the past ...