A typical line looks like this...
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=129 COMMENT='Compiled E-Mails';I want to remove DEFAULT CHARSET= and COLLATE= after resetting AUTO_INCREMENT=0
I do not want to change the engine and comment. (7 Replies)
Hi,
I understand either AWK or SED can do this, but I not sure how to extract the following configuration in section. Meaning when I need to find code with " ip helper-address 192.168.11.2" , it would start from "interface Serial0/0" and "interface FastEthernet0/1". Only displaying both section... (2 Replies)
I have a list of Servers in no particular order as follows:
virtualMachines="IIBSBS IIBVICDMS01 IIBVICMA01"And I am generating some output from a pre-existing script that gives me the following (this is a sample output selection).
9/17/2010 8:00:05 PM: Normal backup using VDRBACKUPS... (2 Replies)
I need to remove the <BR> from all sections of a page, except what is between a section of text:
#!/bin/sh
sed '
/Testing Considerations/,/<B>PT# - Description:/ ! {
s/<BR>//
}
'
But this isn't working. I'm not using the ! operator correctly, can someone... (2 Replies)
Hi Everyone,
I need some help to accomplish the below. help is highly appriciated.
I have a 45 mb file with ldap entries. Each user entry is separated by a string # entry-id: 1 and so on. Some of the entries has a string xyz: true. I want to delete the section if the user section has xyz: true... (6 Replies)
I have a data file like below:
2011 0701 2015 21.2 L 37.692 46.202 18.0 Teh 4 0.3 2.1 LTeh 1
GAP=233 E
Iranian Seismological Center, Institute of Geophysics, University of Tehran 6
STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7
TBZ SN EPg 0 2015 31.19 -0.3... (3 Replies)
Hi, I have a log file from Munin like this:2012/12/04 13:45:31 : Munin-update finished (29.68 sec)
2012/12/04 13:50:01 Opened log file
2012/12/04 13:50:01 : Starting munin-update
2012/12/04 13:50:01 Error occured in under in the configuration.
2012/12/04 13:50:01 Could not parse datafile... (9 Replies)
Hi Guru's,
I am new to unix scripting. I have a huge file with user details in it(file2) and I have another file with a list of users(file1). Script has to search a user from file1 and get all the associated lines from file2.
Example:
fiel1:
cn=abc
cn=DEF
cn=xyx
File 2:
dn:... (10 Replies)
Hello,
I have a log file that has several sections "BEGIN JOB, End of job" like in the following example:
19/06/12 - 16:00:57 (27787398-449294): BEGIN JOB j1(27787398-449294) JOB1
19/06/12 - 16:00:57 (27787398-449294): DIGIT: 0
number of present logs : 1
19/06/12 - 16:00:57... (4 Replies)
Discussion started by: mvalonso
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)