Source File:
abcdefghijklmnop01qrstuvwxyz
abcdefghijklmnop02qrstuvwxyz
abcdefghijklmnop03qrstuvwxyz
abcdefghijklmnop04qrstuvwxyz
abcdefghijklmnop05qrstuvwxyz
Whatever characters are in 17-18 on each line of the file, it should be concatenated to the same line at the character number... (6 Replies)
Hi,
i have written a script. it collects data based on the sql queries executed by it. i have multiple output files. after the output file is made i need to do some cosmetic changes in the files and then store them. i am unable to use sed conditions inside the loop.
see below code for... (3 Replies)
My need is :
Want to change
docBase="/something/something/something"
to
docBase="/only/this/path/for/all/files"
I have some (about 250 files)xml files.
In FileOne it contains
<Context path="/PPP" displayName="PPP" docBase="/home/me/documents" reloadable="true" crossContext="true">... (1 Reply)
Problem: Need to read contents from a file and use that value inside sed as avariable. sample code below. THe below code replaces contents inside file123 for matched string with "$x" value only. but we want the value of x which is read from TextFile.txt to go in there.
cat TextFile.txt|while... (3 Replies)
Hello experts,
I'm stuck with this script for three days now. Here's what i need.
I need to split a large delimited (,) file into 2 files based on the value present in the last field.
Samp: Something.csv
bca,adc,asdf,123,12C
bca,adc,asdf,123,13C
def,adc,asdf,123,12A
I need this split... (6 Replies)
Hi All,
I am trying to use sed command inside a shell script.
The same sed command is working on command line, however its not working while using inside a shell script.
From various sources i found , it could be done by using -i option, but its not working as well.
sed... (11 Replies)
HI ,
I am trying to write a code where if a file system has / at the end then replace it with null but it should not affect root file system /
for example if
ip is /var/opt/home/ then o/p is /var/opt/home
but if ip is / then it should remain /.
for this i am using below code but no success... (8 Replies)
Hello folks,
I have multiple occurrences of the pattern:
).:
where is any digit, in various text context but the pattern is unique as this regex. And I need to turn this decimal fraction into an integer (corresponding percent value: the range of 0-100).
What I'm doing is:
cat... (1 Reply)
The requirement is i need to find an array value matching with pattern {5:{ , replace that with 5: and reassign that to same array index and print it.
I write something like below and the issue is sed command is not working. If i replace " with "`" the script gives syntax error.how can i... (8 Replies)
Discussion started by: bhagya123
8 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)