Hi all,
I have a spreadsheet with 20 fields(columns) in which the fifth column is a numerical column with records such as 00024,00455, 00234,556670,465700,00456 etc. I want to consider the leading zeros for this column so that I can use some logic. Now the problem is that I am unable to add... (3 Replies)
Hi, I am looking for a unix command which inserts double quotes around all values in a text file. For example,
Input:
1234 200 4686 3506056
9646 457 5647 5066762
5656 366 5869 5978459
Output:
"1234" "200" "4686" "3506056"
"9646" "457" "5647" "5066762"
"5656" "366" "5869"... (2 Replies)
How do I execute a command containing a double quote ?
I pass a variable to grep that contains spaces, so I need to quote it,
but it does not work.
#!/usr/bin/ksh
set -x
txt='"next to"'
cmd="grep $txt ~dpearso5/file2"
echo $cmd
$cmd
This is the error I get:
+ grep "next to"... (1 Reply)
Hi,
Can you please help me?
How to Parse a comma delimited and optionally quotes dimilited file?
sample.dat
----------
"I",+2007,"SANDA, 20, MARTIN PLACE","SANDA 20MARTIN"
"D",+2008,"RANDA, 22, MARTIN PLACE","RANDA 22MARTIN"
Thank you.
Ram (8 Replies)
Hello,
Can someone help me to do this with awk or sed? I have a file with multiple lines, each line has many fields separated with a tab. I would like to add one more field holding 'na' in between the first and second fields.
old file looks like,
1, field1 field2 field3 ...
2, field1... (7 Replies)
In a bash script, I need to pass a parameter that has space in-between using double quotes as follows:
CMD="SomeExecutable"
# Parameter that has a space in-between
PARAM1="TIMO 2"
CMD_IN="--name=\"$PARAM1\""
CMD_OUT=`$CMD $CMD_IN`
expected/required command execution:... (4 Replies)
Hi Unix Gurus..
I am new to Unix. Please help me. The file I am getting is as follows:
Input File
"2011-07-06 03:53:23","0","I","NOT SET ",,,,"123985","SAW CUT CONCRETE SLAB 20"THICK",,"98.57","","EACH","N"
"2011-07-06 03:53:23","0","I","NOT SET ",,,,"204312","ARMAFLEX-1 3/8 X... (2 Replies)
I have a csv data file :
A,B,C,D,"A,B",E,"GG,H"
E,F,G,H,I,J,"S,P"
I need to replace all "," with "|" except the ones between double quotes i.e
A|B|C|D|"A,B"|E|"GG,H"
E|F|G|H|I|J|"S,P"
CAn someone assist? (8 Replies)
Hi All,
I'm unable to load the data using sql loader where there are double quotes within the double quotes As these are optionally enclosed by double quotes.
Sample Data :
"221100",138.00,"D","0019/1477","44012075","49938","49938/15043000","Television - 22" Refurbished - Airwave","Supply... (6 Replies)
Please help me to use echo or printf type of command to print some value from variable within double quotes - I want to print the double quote ( " ") also.
I tried
#!/bin/bash
VALUE=some_value
echo '{"value" : "$VALUE"}'
I was expecting the above script would produce ..
{"value" :... (3 Replies)
Discussion started by: atanubanerji
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)