Assume, I created one file three years back and I like to move the file to some other directory with the old date (Creation date)? Is it possible? Explain? (1 Reply)
Dear...
I have a scrpit that contains multiple read command.... when I run the script I have to enter 3 variables so that I can get the output..
but, I dont want to put those 3 inputs manually every time... I want to make a shell that reads the 3 inputs from a file.
the script name is... (4 Replies)
Hi Experts,
I have files name
report_20090416
report_20090417
report_20090418
report_20090420
report_20090421
I have 2 input from user
From Date: 20090417
To Date: 20090420
and I need to grep only those line in between. Output should be
report_20090417
report_20090418... (3 Replies)
i open the google search and want to search something, now , i want to change the input method ,but i don't know how to change the default input.
the default is english, how to exchange with others. thanks in advance (0 Replies)
I have 2 Servers IP:
1)10.1.1.27
2)10.1.2.27
#more /etc/postfix/transport
Domain.com smtp:ServerIP
Now i want to change the smtp:ServerIP according to user interaction: (2 Replies)
I have 100 files in a directory , all the files have a word "error" and they are created in different date . Now I would like to change the word from "error" to "warning" , and keep the date of the files ( that means do not change the file creation date after change the word ) , can advise what can... (0 Replies)
I have 100 files in a directory , all the files have a word "error" and they are created in different date . Now I would like to change the word from "error" to "warning" , and keep the date of the files ( that means do not change the file creation date after change the word ) , can advise what can... (7 Replies)
Hi,
I have been trying to get the yesterdays date for the Input date I pass.
I know how to do for the current timestamp but how to do for the input date.
Is there any way I can convert to epoch time and do manipulations and back to human readable date?
Please help
Thanks
... (1 Reply)
hi all,
need a script or command to get the previous date for the given input date...
like in my script i will pass date as input parameter like 2014-12-01 and i want the output as previous date.. ie.. 2014-11-30 (2 Replies)
Suppose i have a list of files in a directory as mentioned below
1. Shankar_04152019_ny.txt
2. Gopi_shan_03122019_mi.txt
3. Siva_mourya_02242019_nd.txt
..
.
.
.
.
1000 . Jiva_surya_02282019_nd.txt
query : At one shot i want to modify the above all filenames present in one path with... (4 Replies)
Discussion started by: Shankar455
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)