My file is
I want to extract only part between first '(' and consecutive ')'
The first '(' will be after the insert statement in the file.
the output should be
Please suggest a solution to do this.
Last edited by Franklin52; 08-23-2013 at 06:23 AM..
Reason: Please use code tags for data and code samples
Hi,
I want to extract a part of filename and pass it as a parameter to one of the scripts. Could someone help.
File name:-
NLL_NAM_XXXXX.XXXXXXX_1_1.txt.
Here i have to extract only XXXXX.XXXXXXX and the position will be constant. that means that i have to extract some n characters from... (6 Replies)
Hi there,
I'm having some problem with UNIX scripting (ksh), perhaps somebody can help me out?
For example:
------------
Sample content of my log file (text file):
--------------------------------------
File1: ....
info_1 ...
info_2 ...
info_3 ...
File2: ....
info_1 ...
info_2 ...... (10 Replies)
I need to extract the following lines from this text and put it in different files.
From xxxx@gmail.com Thu Jun 10 21:15:46 2010
Return-Path: <xxxxx@gmail.com>
X-Original-To: xxx@localhost
Delivered-To:xxxx@localhost
Received: from ubuntu (localhost )
by ubuntu (Postfix) with ESMTP... (11 Replies)
Hi friends,
I want to select and use the certain part of a line. For example I have the following line
home/1245/hgdf/acsdf/myhome/afolder/H2O/endfile
how can I extract the part " /myhome/afolder/H2O/endfile "
thanks (6 Replies)
I have a file with 100s of lines of text. I want to perform an extraction of this line:
Info bpzs(pid=2652) using 1000 bits
I have not been able to extract it. Should I try expr match or is there another method? This line has data both in front of and in back of it. I do not have grep -o... (5 Replies)
I have a text file, input.fasta contains some protein sequences. input.fasta is shown below.
>P02649
MKVLWAALLVTFLAGCQAKVEQAVETEPEPELRQQTEWQSGQRWELALGRFWDYLRWVQT
LSEQVQEELLSSQVTQELRALMDETMKELKAYKSELEEQLTPVAEETRARLSKELQAAQA
RLGADMEDVCGRLVQYRGEVQAMLGQSTEELRVRLASHLRKLRKRLLRDADDLQKRLAVY... (8 Replies)
Hi,
I have a string with name as 20140412-s1-Potopolive_promos_20140412. So I want to extract only Potopolive string. Could you please help me the command.
O/p : Potopolive
Thx in advance (5 Replies)
I need to save part of a file to a different one, start and end offset bytes are provided by two counters in long format. If the difference is big, how should I do it to prevent buffer overflow in java? (7 Replies)
I have a variable and assigned the following values
***XYZ_201519_20150929140642_20150929140644_211_0_0_211
I need to read this variable from backward and stop read when I get first underscore (_)
In this scenario I should get 211
Thanks
Kris (3 Replies)
Discussion started by: mkris
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)