Hi Gurus,
In my file I have an amount field from position 74 to 87, which contains values starting with '+' as well as '-'. I want to add all positive values in a varible called "CREDIT" and all negative values in a variable "DEBIT". I know, we can use grep to identify values with positive and... (4 Replies)
Hello,
I have a list like this :
1
2
-4
0
-3
-7
5
6 etc.
Is there a way to remove all the positive values and print only the negative values, without using grep, sed or awk?
Thanks,
Prasanna (4 Replies)
Please help me with an shell / awk script to achieve following;
File-1:
ABCDW01 12322 23322
BDADW01 22232 24453
EDFAW00 32232 23422
and so on, notice that the first coloumn is a code and the another file contains the real value of each entry in the first colum above but not in a... (4 Replies)
hi all ,
( perl)
i am trying to replace jst one column in a file for eg
month dayofweek dealar car-name
jan thurs mercedes c300
feb wed lexus is300
all this data is in a master file and i want to replace jan with 1
feb... (5 Replies)
Hi,
I have a tab delimited text file where some lines have the string "NA" in the second column. For these lines, I want to replace NA with the value in the first column, the symbol underscore followed by the value in the fourth column. How do I go about doing that? Thanks!
Input:
1 ... (3 Replies)
Hi All,
i have 20 Obligors when ever i dont find all of them on particular row/line from each in put i need to print it in different file.
using below command but it is not working please help at earliest.
Steps:
set -A FILENAME $( cat... (10 Replies)
Can anyone please assist me?
Please find the attached input and output file for ur reference.
a)Incase if i get negative value (ex:-000100) in the 11th column then i have to convert the value to 0000000(7 zeros-length is 7) and then
print the entire record.
b)Incase if there is no... (2 Replies)
Hello everyone,
i need to replace in the second column of my csv file, points by nothing and dash by comma like this:
Input:
1 2 1;12.111.312-2;1.2;2;1-3
2 1 1;11.212.331-1;3.3;1;2-2
Output:
1 2 1;12111312;2;1.2;2;1-3
2 1 1;11212331;1;3.3;1;2-2
SED or PERL commands preferably.
... (7 Replies)
Hello All,
I am having the file as below .I need to replace column 9-12 with some other values. In the below file I need to replace 1509 to 1508 and 1508 to 1507 .Can you please help me in how to do that
Thanks,
Arun
... (10 Replies)
Hi Gurus,
I have requirement need to sum the value, the logic is if the value is negative then time -1, I tried below two ways. one is failed, another one doesn't work.
awk -F"," '{if($8< 0 $8*-1 else $8) sum+=$8}{print sum, $8} END{printf("%.2f\n",sum)}'
awk -F","... (4 Replies)
Discussion started by: ken6503
4 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)