I work on a UNIX HP 10.20 system that recently crashed. I am new with UNIX but I pick things up quick. The system I work on consists of two computers with the same basic hardware config. I have been having trouble loading the program software it uses, NOT the UNIX software, so I used the a... (1 Reply)
Hello,
I want to write a ksh script about changing UID and changing group with GID. There are multiple servers i want to perform that job.
linux1
linux2
linux3
linux4
linux5 ......
.
.
.
.
.
1.) How can i enter "password" in script rather asking me?
I was trying this...
ssh... (2 Replies)
Hi all, im new to awk and would apreciate if you could tell me how to do this, i have a file with several entries like this:
2008-09-09 21:57:45 44 403 CUSTOM_EVENT Upgrade - end1
2008-09-09 21:57:46 45 403 CUSTOM_EVENT Component Check - start... (3 Replies)
Dear friends,
My requirement below-
1] I have a zip file on unix server - ETL_Extracts_20100218175009.zip which is composed of various entity extracts namely... ENTITY1.txt, ENTITY2.txt, ENTITY3.txt etc....
How do I unzip only a single file ..say ENTITY2.txt from this zip file.
CAn you... (2 Replies)
Hi just learning Unix in college now and this is my first post here, so I dunno if this goes here, or in the homework section technically.
Anywho, trying to change all the / in a file into - using vi...
i went into the command prompt, and put in :%s///-/g and it comes up with E488: Trailing... (2 Replies)
Hi I want to replace single quote with two single quotes in a perl string.
If the string is <It's Simpson's book> It should become <It''s Simpson''s book> (3 Replies)
Hi,
I have a requirement with,
No~Dt~Notes
1~2011/08/1~"aaa
bbb
ccc
ddd
eee
fff
ggg
hhh"
Single column alone got splitted into multiple lines.
I require the output as
No~Dt~Notes
1~2011/08/1~"aaa<>bbb<>ccc<>ddd<>eee<>fff<>ggg<>hhh"
mean to say those new lines to be... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Make “hardlink” readable, writeable, executable by you, but not readable, writeable, executable by anyone else.... (4 Replies)
Hi,
I have 2 csv/txt files with single columns. I am trying to merge them using paste, but its not working..
output3.csv:
flowerbomb
everlon-jewelry
sofft
steve-madden
dolce-gabbana-watchoutput2.csv:
http://www1.abc.com/cms/slp/2/Flowerbomb
http://www1.abc.com/cms/slp/2/Everlon-Jewelry... (5 Replies)
Dear all,
I have a remote CentOS7 server that has two network cards. Each card has four ports and port one of card one was defined with the IP address assigned to the server. So far, so good and it's been working for over a year. We have now got cables sorted out so there are four paths... (4 Replies)
Discussion started by: rbatte1
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)