Following is input:
<P
align="justify"
><FONT size="+1" color="#221E1F">the tiny bundles of hairs that protrude from them. Waves in the fluid of the inner ear stimulate the hair cells. Like the rods and cones in the eye, the hair cells convert this physical stimulation into neural im<FONT... (2 Replies)
I am trying to find a way to create a script which will extract the first line of a file and then rename the file (or create a new file with the same content as the old file) using the first line as the name. The first line being a single word, that is. I am hopeless at programming, if anyone can... (5 Replies)
Hi, i have a filename CRED20102009.txt in a server
20102009 is the date of the file ddmmaaaa format
the complete route is
/dprod/informatica/Fuentes/CRED20102009.csv
i want to extract the date to create a new file named Parameters.txt
I need to create Parameters.txt with this... (6 Replies)
I have 2 text files where I need to parse data from file 2 using the data from file 1. Below are my sample files
File 1 (tab delimited)
257 350
670 845
725 1025
767 820
...
....
....
file 2 (tab delimited)
220..450 TA AB650 ABCED
520..850 GA AB720 ABCDE
700..1100 TC AB820 ABCDE... (2 Replies)
Hi,
Here is my question: suppose I have files like
1990_8xdaily_atmos.nc
1991_8xdaily_atmos.nc
1992_8xdaily_atmos.nc
1993_8xdaily_atmos.nc
1990_daily_atmos.nc
1991_daily_atmos.nc
1992_daily_atmos.nc
1993_daily_atmos.nc
1990_month_atmos.nc
1991_month_atmos.nc
1992_month_atmos.nc... (1 Reply)
Hi All,
Thanks in Advance
I am working on a shell script. I need some assistance.
My Requirement:
1) There are some set of files in a directory like given below
OTP_UFSC_20120530000000_acc.csv
OTP_UFSC_20120530000000_faf.csv
OTP_UFSC_20120530000000_prom.csv... (0 Replies)
Hi,
I have some files with these patterns:
WI_SCOPE_DATA_CHANGE_2017-09-12_15-30-40.txt
WI_SCOPE_BACK_COMPLETE_QUEUE_2017-09-12_15-31-40.txt
WI_SCOPE_CURRENT_CHECK_QUEUE_2017-09-12_15-32-40.txt
WI_SCOPE_DAILY_PARTY_2017-09-12_15-33-40.txt
I want to extract date from filename and save it... (1 Reply)
Hi,
I want to extract part of filename, for eg:
File="010020004_S-TOR-Sort-CASAP_20170519_121504_0007.TXT"
here i need first 5 words of file i.e.
FilePart="$(echo "${File%"${File#******}"}")"
Echo $FilePart
010020004_S-TOR-Sort-CASAP
But what if i get filename like below:
... (3 Replies)
Discussion started by: gnnsprapa
3 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)