Hi, I've been trying to removed duplicates lines with similar columns in a fixed width file and it's not working.
I've search the forum but nothing comes close.
I have a sample file:
27147140631203RA CCD *
27147140631203RA PPN *
37147140631207RD AAA
47147140631203RD JNA... (12 Replies)
Hello experts,
I am trying to remove all lines in a csv file where the 2nd columns is a duplicate. I am try to use sort with the key parameter
sort -u -k 2,2 File.csv > Output.csv
File.csv
File Name|Document Name|Document Title|Organization
Word Doc 1.doc|Word Document|Sample... (3 Replies)
Hi I have a file that are a list of people & their credentials i recieve frequently The issue is that whne I catnet this list that duplicat entries exists & are NOT CONSECUTIVE (i.e. uniq -1 may not weork here )
I'm trying to write a scrip that will remove duplicate entries
the script can... (5 Replies)
Hi,
I have a file in the below format.,
test test (10)
to to (25)
see see (45)
and i need the output in the format of
test 10
to 25
see 45
Some one help me? (6 Replies)
Hi All
In unix ,we have a file ,there we have to remove the duplicates by using one specific column.
Can any body tell me the command.
ex:
file1
id,name
1,ww
2,qwq
2,asas
3,asa
4,asas
4,asas
o/p:
1,ww
2,qwq
3,asa (7 Replies)
I have a test file with the following 2 columns:
Col 1 | Col 2
T1 | 1 <= remove
T5 | 1
T4 | 2
T1 | 3
T3 | 3
T4 | 1 <= remove
T1 | 2 <= remove
T3 ... (7 Replies)
i want to remove all the duplictaes in a file.I dont want even a single entry.
For the input data:
12345|12|34
12345|13|23
3456|12|90
15670|12|13
12345|10|14
3456|12|13
i need the below data in one file
15670|12|13
and the below data in another file (9 Replies)
I have an input file abc.txt with info like:
abcd
rateuse
inklite
robet
rateuse
abcd
I need to remove duplicates from the file (eg: abcd,rateuse) from the file and need to place the contents in same file abc.txt if needed can be placed in another file.
can anyone help me in this :( (4 Replies)
i hav two files like
i want to remove/delete all the duplicate lines in file2 which are viz unix,unix2,unix3.I have tried previous post also,but in that complete line must be similar.In this case i have to verify first column only regardless what is the content in succeeding columns. (3 Replies)
Discussion started by: sagar_1986
3 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)