I have simple text log file look like that
-----------------------------------------
Mon May 8 07:02:41 2006
Some text to show log
Mon May 8 07:05:30 2006
Some text to show log
Some text to show log
Mon May 8 07:11:07 2006
Some text to show log
Mon May 8 07:45:56 2006
Some text to... (1 Reply)
Hi
I need to to direct only the path and the name of the trace file to a new file. How do I use grep/awk/sed filter?
eg.
ABC.root>cat alert_omc_dg.log | grep trc
ORA-00060: Deadlock detected. More info in file /u01/oradata/omc/udump/omc_dg_ora_3555.trc.
ORA-00060: Deadlock detected. More... (8 Replies)
Hi all,
I have a input like this
3AF9:3B01
and need to expand to the below output
3AF9
3AFA
3AFB
3AFC
3AFD
3AFE
3AFF
3B00
3B01
Please let me know the easiest way for achieving this. Thanks for the help in advance... (6 Replies)
Dear Friends,
I want to know how to grep for the lines that has a number between given range(start and end).
I have tried the following sed command.
sed -n -e '/20030101011442/,/20030101035519/p'
However this requires both start and end to be part of the content being grepped. However... (4 Replies)
Hi all,
I am having a bit of a hard time using awk. I must do something wrong, but I don't know what... Any help would be greatly appreciated!
I read a file, as follows :...
ATOM 21 C THR A 4 23.721 -26.194 1.909 1.00 32.07 C
ATOM 22 O THR A 4 ... (2 Replies)
i have this problem:
i must hide a string with a character such as _ by command
WORD=string;
XXX=`echo $WORD | sed 's//_/g'
but after, users must send in input a character and i must to replace the _ with the input character or better i can do this
-$CHARS_INPUT
i have think to use command... (3 Replies)
I want to find all files under /var directory that refer to any ip from 10.1.1.1 to 10.1.1.255 using grep. How can this be done.
Please help (5 Replies)
hi,
I want to store from 102 character to 128 character to a variable of header record which can be identified as 'HDR' which is the first 3 characters in the same line of a same.txt file.
Please advise.
Thanks (4 Replies)
Hi
I am having file :
1|2443094 |FUNG SIU TO |CLEMENT
2|2443095 |FUNG KIL FO |REMENT
This file contains only 3 fields delimeted by "|". Last field is a decsription filed and it contains character "|". Due to this my output if breaking in 4 fields. I... (7 Replies)
Hi there,
I am trying to remove al letters after : character on specific columns from 10th column till 827. I used sed and cut to do so but I am sure there is better one liner someone can think of from unix community members.
Huge file but it has this structure (Total number of Columns =... (10 Replies)
Discussion started by: daashti
10 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)