Use this tag for questions about file management and operations on files.
0
votes
1answer
7 views
Is there a way to protect a file from being deleted, but not from being altered?
Here is what i want to happen. I want theses files to be able to be altered by myself on my basic account. To me, they are high priority files, with many backups. But we have some young-ins in the ...
-6
votes
1answer
40 views
How to list all file names in terminal?
Let's say I want a list of files in the Downloads folder to be viewed from the terminal. How would I do that?
2
votes
3answers
134 views
How to create multiple files with different names and different extensions?
I'm trying to create some files that has different names and with different extensions. Let say I want to create for example 3 files with following name and extension:
File001.000
File002.001
...
5
votes
3answers
529 views
Shorter command for deleting files
Our web server was originally maintained by a different company. They wrote a short script to clean out cache files. Their file has several lines that read like this:
/usr/bin/find ...
0
votes
0answers
16 views
Programatically capturing application inputs and outputs
I've been given a mess of applications that all touch various common files and data sources. (Retail IT environment so lots of generic sources of data that gets sliced and diced into various ways and ...
2
votes
1answer
31 views
Using `stat` to determine filled blocks
How can I find the number of filled block of a certain file, using the stat function?
I have already found the command $(stat -c%b "$FILENAME"), which gives the number of allocated blocks but I don't ...
1
vote
1answer
35 views
What is the cause of this error: Error: EACCES, permission denied
I have two three users:
db, nr, ba
All three are members of the group dbp
Node.js is installed in /usr/bin
If I run the command :
/usr/bin/node /home/db/dbb/m/i.js
Then it works fine when I run ...
1
vote
1answer
65 views
How to compare directories with binary files
I'd like to compare directories with binary files. Actually, I'm not interested in what the actual differences between files are, but to know if there's a differ (and what files differ). Previously I ...
2
votes
3answers
47 views
Remove files from listing that are created/modified on Saturday
I am not sure if it is possible.
I do ls -l, it gives all the files in the current directory. Is there a way to say list only files that weren't created/modified on Saturday's with shell command?
1
vote
3answers
37 views
How to remove matching files from directory A in directory B in the command line?
I have some duplicate files in directories A and B, how could I delete the dupes in B using the filenames from A in bash?
How to do it in other shell's is a welcome bonus.
1
vote
1answer
22 views
Incrementing/decrementing a number in a file from a ( zsh ) script
From a script ( running multiple times simultaneously ), I would like create a file something like:
echo "0" > /tmp/count
Then I would like to do three functions.
incr /tmp/count
decr ...
1
vote
1answer
18 views
Automatically pauseing rsync if target is full
I need to transfer 80gb's of unsorted text documents from one computer to another and all I have is a 32gb USB. Is there an option to make rsync automatically pause when the USB is full without losing ...
24
votes
2answers
8k views
I made a mistake last night, which deleted 1800GB of my File-Server unintentionally
I ran this command yesterday, I thought on a test machine, but it was a File-Server connected through SSH.
sudo rm -rf /tmp/* !(lost+found)
My terminal emulator is Konsole. My system is Debian 7.
...
5
votes
1answer
39 views
List all files that are present in the cache
This question answers to the question on how to find the what is part of cache. However, in the fincore executable you have to pass the filename to check if it is part of cache.
Is there a tools or a ...
13
votes
3answers
631 views
Determining if a file is a hard link or symbolic link?
I'm creating a shell script that would take a a filename/path to a file and determines if the file is a symbolic link or a hard link.
The only thing is, I don't know how to see if they are a hard ...
3
votes
4answers
69 views
Determining the number of files and subdirectories in Linux
When displaying directories in linux using ls -ld, I get something like this:
user@shell:~/somedirectory$ ls -ld
drwxr-xr-x 2014 K-rock users 65536 20011-11-05 11:34
user@shell:~/somedirectory$
...
5
votes
3answers
266 views
How to view last 5 lines from last created/modified file?
Every day I have to take backup and update the status to support teams at particular time for which I need to check last 5 lines of last created/modified *.aff file in a directory and update them.
...
0
votes
1answer
27 views
Check for subdirectory
A)I used the following code to get the modified date of a file. But this is also selecting the subdirectories and thus returning an error. How van I fix this.
for file in $1/*; do
echo `stat ...
0
votes
1answer
31 views
How to execute genymotion?
I just downloaded an Android Emulator and it downloaded as genymotion-2.3.1_x64(1).bin-- how do I open that? Install it?
1
vote
2answers
39 views
how to I change permissions to all subdirectories except for 1 folder using a single find command?
I need to change the folder and file permissions in all subfolders except for 1 folder. Currently, I'm running several find/exec commands to make it work.
e.g. find /mystuff/temp/videos -type d -exec ...
0
votes
2answers
23 views
Can LVM split files between volumes?
Let's say I have 2 volumes 2 GB each (kept as single group). And I would copy there 3GB file.
Will it be split?
I just hope the answer is "no", and the files are atomic. The reason is -- with ...
18
votes
4answers
1k views
Are Unix Internet sockets files?
I understand that "Everything is a file" is one of the major concepts of Unix, but sockets use different APIs that are provided by the kernel (like socket, sendto, recv, etc.), not like normal file ...
2
votes
5answers
95 views
How to find different files in UNIX based on . extension?
How to find different files in UNIX based extension. Lets say suppose if I have 100 files for each vamsi.log-vamsi100.log, krishna.txt-krishna100.txt, super.csv..., rajat.jpeg..., ...
6
votes
3answers
301 views
how do I remove all files in a folder except just some specified files?
I want to remove all files in a directory while leaving just some specified files, they don't have anything in common by name. How could I achieve that?
For example, the file names I want to keep ...
1
vote
1answer
33 views
Delete a directory under Cryptkeeper without access to its account
I have a computer with read-write permissions for one of it is directories. I lost the password that can help me to log in to that directory. How can I delete this folder.
I am using the following ...
0
votes
2answers
66 views
Constantly check if file is modified bash
I have a file called file1 I want in a script, whenever there is a change in it, do something, a beep sound actually. How do I do that ¿? Thank you in advance
0
votes
1answer
91 views
“bash: cannot create temp file for here-document: No space left on device”
My / only has about 800MB free space left. I guess it is the reason that
$ convert * book.pdf
Segmentation fault (core dumped)
bash: cannot create temp file for here-document: No space left on device
...
3
votes
1answer
21 views
I need to create file with name is the result of the command in Solaris
I need to create only one file with name is the result of the command ls -l | head -2.
I can't use environment variables. The filename must contain newline symbols.
I've tried to use touch 'ls -l | ...
1
vote
1answer
43 views
File weird character encoding [closed]
I'm on ubuntu 13.10 and am writing a program in eclipse that's supposed to output my result in a file. I'm building an LZW compression and decompression program that uses character conversion to its ...
0
votes
4answers
240 views
keep the last file of every month and delete the rest
I have files like below. I want to keep SEP 30, OCT 30....files and delete the rest. Can you please help me with any script?
-rw-r--r-- 1 nbswmcm advboprd 13463761 Sep 2 01:19 ...
1
vote
2answers
64 views
React to incoming files in a directory on HP-UX
How can I achieve this logic using a script:
Monitor new incoming files in a directory. If files are not received in the directory for 3 hours or if the received file is empty
then do something. ...
6
votes
4answers
568 views
Modify a file without creating another file
Is there a way to modify a file without writing the contents to other file, without sed and awk?
For example,
$ cat test.txt
aaa
aaa
bbb
ccc
ddd
Replacing using sed with -i option, sed -i ...
2
votes
1answer
43 views
Maximum time a file descriptor can be held
I am writing a long-running program in the Linux environment that will be calculating entries in a large table. Every time it comes to the end of the row, it outputs the calculated values into a ...
1
vote
3answers
33 views
Why does Debian prefer a temp file replacing the original over modifying bytes in original file?
In the mp3gain manpages, you can read the following:
-t mp3gain writes modified mp3 to temp file, then deletes
original instead of modifying bytes in original file (This ...
-3
votes
0answers
55 views
7z command for files larger than 4GB ( unzip doesn't work) [duplicate]
My unzip command doesn't work for files that are greater than 4GB. Consider my file name is unzip -p -a filename.zip, the command doesn't work since the size of the file is larger. I need to know the ...
2
votes
5answers
117 views
Finding new lines in one file compared with another
I need to compare two txt files. Every line of both txt files contain entries. One entry per line. The new file contains entries the old one lacks. I have tried to use diff and vimdiff but these don't ...
4
votes
1answer
39 views
rsync doesn't preserve directory ownership even with -a
I use this rsync invocation to backup my home directory:
rsync -aARrx --info= --force --delete --info=progress2 -F "$USER_HOME" "$BACKUP_MNTPOINT"
rsync man page says that -a implies -g and -o ...
1
vote
1answer
23 views
Postfix no longer logs to /var/log/mail after it has been deleted and re-created?
I accidentally deleted the /var/log/mail file. Until that point I was able to monitor it using postfix stuff. Now, it seems that Postfix doesn't send its logs to /var/log/mail, since the file is not ...
0
votes
1answer
57 views
Why the size of an empty directory in Linux is 4KB? [duplicate]
I'm using Ubuntu 14.04 and I made an empty directory on /tmp with the mkdir command:
cd /tmp
mkdir foo
and then I checked it's size using ls:
ls -ldh foo
and the result shows that the size of ...
1
vote
0answers
32 views
open() sys call [closed]
Process A wants to open a file
fd1 = open("/var/file1", O_RDONLY);
In the process of opening file1 which table is referred first system wide file table or file descriptor table or in-core inode ...
4
votes
3answers
101 views
Add text with echo but start with new line if file not empty
I'm trying to create next script
echo "#!/bin/sh" >/script
echo "del x.txt" >>/script
witch is ok if /script file is empty, if not - will append first line to last text
#!/bin/sh
del ...
3
votes
3answers
78 views
How to use all the inodes
Without creating a file can I use any inode which is free?
I want to write a script that will use all free inodes in the system. is it possible?
1
vote
3answers
71 views
Find and delete duplicate txt files
I have a folder with around 300 text files, is there any command that reads every every file indivdually and deletes the duplicate files? I mean the content and not the file names.
0
votes
0answers
21 views
Change encoding of a text file in-place: iconv alternative? [duplicate]
Apparently, iconv is unable to use the same file as input and output file. Other tools, e.g. sed, have an -i switch that allows "updating" a file in-place. (Under the hood, temporary files are ...
2
votes
1answer
65 views
How do I choose a file names with consecutive numeric suffixes?
I like to preserve things, so I want to preserve .bash_history.
I would like to copy it into a directory using a script. Like here
#!/bin/bash
#Something here? number=~/Desktop/Coding/Bash\ ...
2
votes
1answer
47 views
Add content one file to another
FILE1=$1
FILE2=$2
if [ ! -e "$FILE2" ]
then
touch $FILE2
fi
while read line; do
if grep -q "$line" $FILE2
then
echo
else
echo $line >> $FILE2
fi
done < $FILE1
I want ...
4
votes
1answer
104 views
Why doesn't inotifywatch detect changes on added files?
I'm trying to monitor my /tmp folder for changes using inotifywatch:
sudo inotifywatch -v -r /tmp
After creating couple of files (touch /tmp/test-1 /tmp/test-2), I'm terminating inotifywatch (by ...
1
vote
3answers
49 views
How to access temporary file straight after creation?
I've script which is connecting to remote host via SSH, creates temporary file and executing the following command:
Calling system(mysql --database=information_schema --host=localhost < ...
1
vote
1answer
16 views
What files does affect apt-get purge¿?
I want to know before doing apt-get purge <packet> what files thats gonna have effect on.
The reverse thing would be, what packet do I have to do purge if I want to remove that file (apt-file ...
1
vote
4answers
37 views
How to do grep even if the file is not present?
I am doing something like this in my code
file_nm=`ls -latr *abc*`
if [ `grep "search_txt" "$file_nm" | wc -l` -gt 0 ]
then
echo "string found"
else
echo "string not found"
fi
If the file_nm is ...
