Hello everyone,
I'm writing a script to add a string to an XML file, right after a specified string that only occurs once in the file. For testing purposes I created a file 'testfile' that looks like this:
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And this is the script as far as I've managed:
... (2 Replies)
Can I get some help on this please, I have looked at the many post with similar questions and have tried the solutions and they are not working for my scenario which is:
I have a text file (myfile) that contains
b_log=$g_log/FILENAME.log
echo "Begin processing file FILENAME " >> $b_log
... (4 Replies)
Hi there,
I'd like to write a script that removes any set of character from any string. The first argument would be the string, the second argument would be the characters to remove. For example:
$ myscript "My name's Santiago. What's yours?" "atu"
My nme's Snigo. Wh's yors?
I wrote the... (11 Replies)
Hello. How can i put all of the special characters on my keyboard into a string in c++ ?
I tried this but it doesn't work.
string characters("~`!@#$%^&*()_-+=|\}]{
How can i accomplish this?
Thanks in advance. (1 Reply)
Hi,
I am trying to replace a string in shell but it is not working correctly.
@xcom.file@
needs to be replaced with
tb137
Plz help.Thx.
Please use and tags when posting code, data or logs etc. to preserve formatting and enhance readability, thanks. (4 Replies)
Hi All,
I have a variable like
AVAIL="\
BACK:bkpstg:testdb3.iad.expertcity.com:backtest|\
#AUTH:authstg:testdb3.iad.expertcity.com:authiapd|\
TEST:authstg:testdb3.iad.expertcity.com:authiapd|\
"
What I want to do here is that If a find # before any entry, remove the entire string... (5 Replies)
Hi,
I have string like this ="Lookup Procedure"
But i want the output like this Lookup Procedure
=," should be removed.
Please suggest me the solution.
Regards,
Madhuri (2 Replies)
Hi Folks -
I'm trying to extract the string between two special characters, the "-" and "." symbols.
The string format is as such:
_PBCS_URL_PRD=https://plan-a503777.pbcs.us6.ocloud.com
_PBCS_URL_TST=https://pln-test-a503777.pbcs.us6.ocloud.comIn the above case, I need to extract "a503777".... (7 Replies)
Discussion started by: SIMMS7400
7 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)