Tagged Questions
3
votes
1answer
29 views
The reverse of `tree` - reconstruct file and directory structure from text file contents?
We all know we can use tree to get a nicely formatted text "visualization" of the structure of a directory; say:
$ tree -spugD /usr/include/boost/accumulators/numeric/
...
3
votes
6answers
403 views
Removing blank lines from a file
I want to remove all empty lines from a file. Even if the line contains spaces or tabs it should also be removed.
1
vote
2answers
393 views
Remove first instance of lines with duplicate field value
I have sha1 summed all the image files on my storage server and put the results in a text file in the form of:
sha1sum filename
I've sorted the file and removed all all unique sha1sum entries. So ...
7
votes
6answers
484 views
How can I get a specific line from a file? [duplicate]
I want to extract an exact line from a very big file. For example, line 8000 would be gotten like this:
command -line 8000 > output_line_8000.txt
1
vote
2answers
72 views
Create file with specific formatting from directory contents
I am using Solaris and csh.
In $home/test there are five files: a.txt, b.txt, c.txt, d.txt and e.txt.
If I run
% find $home/test/ -type f -print > ../filenames.txt
that file will look like:
...
0
votes
0answers
61 views
Editing metadata with bash
I have a bunch of photos(jpeg, bmp, png) that I have arranged in such a manner that the metadata is in html form in a separate file.
I would like create some script to read this html file and edit ...
-1
votes
1answer
56 views
Importing an excerpt from a file into a script
I'm trying to import an excerpt from a file into a script for processing.
LIST=$(sed '1,/+++NETWORKLIST+++/d' < /path/to/file | sort -t ";" -k2,2r)
My problem is that this script is not deleting ...
6
votes
1answer
584 views
How can I replace a string in a file(s)?
Replacing strings in files based on certain search criteria is a very common task. How can I
replace string foo with bar in all files in the current directory?
do the same recursively for sub ...
4
votes
3answers
5k views
How do I append text to the beginning and end of multiple text files in Bash?
I have a directory full of text files. My goal is to append text to the beginning and end of all of them. The text that goes at the beginning and end is the same for each file.
Based on code I got ...
4
votes
3answers
208 views
Parsing string token with bash
I have this output (from a previous command):
aaa something
bbb someother
ccc blabla
For each line, I would like to create a file whose name is the first token, and whose ...
2
votes
2answers
98 views
Write In A File at Specific Location
I am trying to create a script that will add a user to the UserDir enabled list or will remove it from UserDir disabled list in userdir.conf.
For the sake of my question, let's say I have the ...
3
votes
2answers
343 views
How to find frequency of occurrences of strings contained in a file?
I have a file that contains a list of URLs of the form
EDIT
http://www.google.com/absd/siidfs/kfd837382$%^$&,
www.google.com,
google.com
yahoo.com/list/page/jhfjkshdjf...
I ...
36
votes
5answers
17k 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
3answers
147 views
Transforming text to tabular form
I have a text file with the following structure:
aaa
bbb
ccc
ddd
eee
fff
1
2
3
4
5
6
1.1
1.2
1.3
1.4
1.5
1.6
ggg
hhh
iii
jjj
kkk
lll
7
8
9
10
11
12
2.1
2.2
2.3
2.4
2.5
2.6
and I want the ...
5
votes
5answers
303 views
Split the content of a file in linux
I have a text file which has content like this:
abc.tar^@xxx.tar^@yyy.tar^@
Say for example I have this content in a file named abc.txt and I want to split the content and write the first two ...
16
votes
3answers
24k views
How to merge all (text) files in a directory into one?
I've got 14 files all being parts of one text. I'd like to merge them into one. How to do that?
2
votes
2answers
101 views
Diverting a file write to process
I have an OSX GUI application which I can't change - it writes new CVS lines to a log file when it completes a job. I'd like to work with these new lines, but they are constantly being added.
Is ...
4
votes
3answers
73 views
Replace all the occurences of a term in the files contained in a folder
In a folder on my system, I have a C++ project that I'm trying to compile.
This process uses some C++ idioms which are not supported by my compiler version. In particular, often inside the code it is ...
1
vote
1answer
579 views
Reading the contents of the file and splitting using ksh
We're using a ksh script for installing one product.
I've another config file, I'd need to read this configuration file from my main script
Content of the Configuration file:
...
2
votes
1answer
520 views
Regarding generating intersection and union of two csv files
I have two csv files, there are some overlap columns between these two files. Assume one file is called as A.csv and another is called as B.csv. The intersection of A and B is called as C.
I would ...
20
votes
1answer
816 views
How to implement a horizontal cat? [duplicate]
Standard cat concatenates files line by line (row by row, if you will). I find myself needing a horizontal cat command more and more often recently; i.e. a command that takes a list of files and ...
2
votes
2answers
98 views
reformat a text file to have all text on one line using CentOS 5.6
I have a 210-line block of HTML that I have stored in a HTML for debugging purposes.
The HTML, as you would expect, is formatted accordingly so is stored in the file with spaces and tabs. Is it ...
3
votes
3answers
239 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 ...
13
votes
2answers
7k 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?
2
votes
4answers
171 views
Lines 1,2,3,4,…,n-1, n to lines n,n-1, …,4,3,2,1
I just realized that I could solve this problem by reversing line numbers from 1, 2, 3,...,n to n, n-1, ..., 3,2,1 and then use the same logic as earlier. So I want to know how can I reverse the order ...
2
votes
2answers
391 views
Comparing files and their properties
I get information of a certain set of files in my mail every day, which looks like this:
58623208 Sep 14 20:08 blbn_blfbe_drv
57904920 Sep 14 19:54 blbn_cycmn
55814208 Sep 14 06:02 clsa_Upd
38912000 ...
1
vote
1answer
840 views
remove carriage return character from large binary file
I have a large binary file ( nearly binary file ! ) which has many \r\n
in it [ gets Generated in windows env and doesnt have controle over generating application ]. I want to remove \r from this ...
9
votes
3answers
5k views
Delete the first n bytes of files
I've got an extreme problem, and all of the solutions I can imagine are complicated. According to my UNIX/Linux experience there must be an easy way.
I want to delete the first 31 bytes of each file ...
7
votes
2answers
1k views
How can I cut a large file in place?
I have a very big text file, about 80GB, and I need to cut a part form it that lies between two given lines. The part I need is not big, and I have not enough space left on the hard drive to do things ...
2
votes
1answer
834 views
How can I add a line to multiple files in a directory tree structure?
Adding a line to multiple files in the same structure is not very hard, but I am stumped on how to do it over a possibly large directory tree structure. So lets say we have your project directory, ...
14
votes
2answers
2k views
How can I count the number of different characters in a file?
I would need a program, that outputs the number of the different characters in a file. Example:
> stats testfile
' ': 207
'e': 186
'n': 102
Exists any tool, that do this?
