I have noticed a lot of expensive books appearing
online so I have decided to copy them to CD.
I was going to write a program in java to do this,
but remembered that wget GNU program some of
you guys were talking about.
Instead of spending two hours or so writing a
program to do this.... (1 Reply)
i am trying to ftp files/dirs with wget. i am having an issue where the path always takes me to my home dir even when i specify something else. For example:
wget -m ftp://USER:PASS@IP_ADDRESS/Path/on/remote/box
...but if that path on the remote box isn't in my home dir it doesn't change to... (0 Replies)
Hi,
i need temperature hourly from a web page
Im using wget to get the web page. I would like to save the page downloaded in a file called page. I check the file everytime i run the wget function but its not saving but instead creates a wx.php file....Each time i run it...a new wx.php file is... (2 Replies)
If I run the following command
wget -r --no-parent --reject "index.html*" 10.11.12.13/backups/
A local directory named 10.11.12.13/backups with the content of web site data is created.
What I want to do is have the data placed in a local directory called $HOME/backups.
Thanks for... (1 Reply)
How can I download only *.zip and *.rar files from a website <index> who has multiple directories in root parent directory?
I need wget to crawl every directory and download only zip and rar files. Is there anyway I could do it? (7 Replies)
Can wget be used to goto a site and piped into a .gz extrated command?
wget ftp://ftp.ncbi.nlm.nih.gov/pub/clinvar/vcf_GRCh37 | gunzip -d clinvar_20150603.vcf.gz (1 Reply)
Hi,
I need to download a zip file from my the below US govt link.
https://www.sam.gov/SAMPortal/extractfiledownload?role=WW&version=SAM&filename=SAM_PUBLIC_MONTHLY_20160207.ZIP
I only have wget utility installed on the server.
When I use the below command, I am getting error 403... (2 Replies)
Discussion started by: Prasannag87
2 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)