04-02-2011
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1. Shell Programming and Scripting
RECORD=NEW|~|VENDORN=LUCENT|~|VENDORM=CBX500_REAR|~|NETWORK=ATM|~|SUBNETWORK=N/A|~|SITE=CIL|~|REGION=KN|~|COUNTRY=PS|~|SWITCH=SWITCH1|~|E
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2. Shell Programming and Scripting
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3. Shell Programming and Scripting
I have file which contains around 5000 lines.
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4. Shell Programming and Scripting
Hello,
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5. Shell Programming and Scripting
HI all,,
I hve defined something like
set data = /data/2012/text
while using
sed 's/$data//g'
I am getting error as:I understand this is due to / slash,but is there any way out of it....
sed: -e expression #1, char 12: unknown option to `s'
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6. Shell Programming and Scripting
Hi,
I'm having a bit of trouble replacing sed's delimiter from a slash to a pipe.
This works...
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7. Shell Programming and Scripting
Hi,
Extremely new to Perl scripting, but need a quick fix without using TEXT::CSV
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8. Shell Programming and Scripting
I've input as ,
abcd|
ef
123456|
78|
90
Desired output as,
abcdef
1234567890
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9. UNIX for Beginners Questions & Answers
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10. UNIX for Advanced & Expert Users
I am trying to do this with one small tweak. I would also like to use a space as a delimiter.
sed 's/ */\
/g' file
This is what my file looks like.
server1, server2, server3
server4 server5 server6
I would like it to look like this.
server1
server2
server3
server4 ... (6 Replies)
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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)