Hi
I have only ever used awk and sed for basic requirements up until now.
I have had to break a log down for multiple purposes.
Using awk, sed and a date script. I am left with this:
(message id, time of msg attempt, message id, domain name, time of msg completion)
... (4 Replies)
sir... am having a data file of customer master., containing some important fields as a set one line after another.,
what i want is to have one set of these fields(rows) one after another in line.........then the second set... and so on... till the last set completed.
... (0 Replies)
sir... am having a data file of customer master., containing some important fields as a set one line after another.,
what i want is to have one set of these fields(rows) one after another in line.........then the second set... and so on... till the last set completed.
I WANT THE DATA... (0 Replies)
I need to know how can I remove all word after comma on each line.
Like:
jjkj,iiuiui,ijlkjkij,ookoo
kijljlj,jhhkj,ijijkijkj,oijkijj
kjkljlkj,kjkjlkjlkj,opok,okop
to
jjkj,
kijljlj,
... (5 Replies)
Hello unix.com people!
How can I modify a text in format:
A:B:C
A:B:C
A:B:C
into
C/A/B
C/A/B
C/A/B
Note: Text is line by line and "C", "B", "A" fields are different each row.
Thanks in advance. (7 Replies)
Hello again unix.com
How can I extract from a large file in format:
steve@aol.com steve hawkins Location of this member is bla bla bla
sun@hotmail.com Sun Ying This member is using browser bla bla bla
to another text in format:
steve@aol.com steve hawkins
sun@hotmail.com sun ying
... (5 Replies)
Hi
I am new to unix and newbie to this forum. I need help in writing a gawk script that search and replace particular text in a flat file.
Input file text :
ZIDE_CONTROL000 100000000003869920900000300000001ISYNC 000002225489 0000000002232122 20120321 16:40:53
ZIDE_RECORD000... (5 Replies)
Hello Unix.com,
How can i generate links like this:
i got
http://upload.com/1/1.txt
and i need to generate links from
http://upload.com/1/1.txt to http://upload.com/1000/1000.txt
Thanks in advance,
Galford D. Weller (4 Replies)
Hello, i am a working student and have to build a patch setup.
I have to replace 2 lines in a .txt file. Can someone help me please.
Now:
wrapper.java.mainclass=org.tanukisoftware.wrapper. WrapperSimpleApp
wrapper.java.classpath.2=../../jdk/lib/tools.jar
replace with:... (12 Replies)
Hello again unix.com,
I have a text file in this format (line-by-line):
hostname id password
hostname id password
hostname id password
hostname id password
I want it to become:
hostname id password
hostname id password
hostname id password
hostname id password (4 Replies)
Discussion started by: galford
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)