hi
I want to copy all files from the current directory and move to .archive file.
Moreover,I want to add .bak to each file name, that will be copied.
How can I do that? (4 Replies)
Hi,
I understand that to copy files across server, the feasible way will be using scp command. Am I right?
What if the two servers are not connected to a network? If by using a cross cable to link up both the server, what will be the best (fastest) way to copy files across? scp as well?
... (3 Replies)
Hi
I am having difficulty copying files from one dir to another due to a space in the names of the file with an extension .rtf
There are a group of files and the command am using is
cp `ls -rt /wlblive/home/whiops/ops/RTFs/*.rtf|head -20` /wlblive/home/jamshed
Since the files are... (3 Replies)
I am userB and have a dir
/temp1
This dir is owned by me.
How do I recursively copy files from another users's dir userA?
I need to preserve the original user who created files, original group information, original create date, mod date etc.
I tried
cp -pr /home/userA/* .
... (2 Replies)
Hi all,
I have a list of xml file. I need to split the files to a different files when see the <ko> tag.
The list of filename are
B20090908.1100-20090908.1200_CDMA=1,NO=2,SITE=3.xml
B20090908.1200-20090908.1300_CDMA=1,NO=2,SITE=3.xml
B20090908.1300-20090908.1400_CDMA=1,NO=2,SITE=3.xml
... (3 Replies)
Hi All,
I am doing this for svn patch making. I got the list of files to make the patch. I have the list in a file with path of all the files.
To Do
From Directory : /myproject/MainDir
To Directory : /myproject/data
List of files need to copy is in the file: /myproject/filesList.txt
... (4 Replies)
Hi all,
I've been tangoing with this one for a couple of days now and I'm still not making any progress.
Basically I'm trying to match three numbers in a string from a text file with matching numbers in a jpeg, and then copying the results to another folder.
Data looks like this:
Model:... (4 Replies)
Hey guys,
Sorry for the basic question but I have a lot of files that I want to separate into groups based on filenames which I can then cat together. Eg I have:
(a_b_c.txt)
WB34_2_SLA8.txt
WB34_1_SLA8.txt
WB34_1_DB10.txt
WB34_2_DB10.txt
WB34_1_SLA8.txt
WB34_2_SLA8.txt
77_1_SLA8.txt... (1 Reply)
Hello
I am copying a tar from windows7 to Solaris with filezilla i could see, some characters in the name of the file get deleted.
I could see only substring of the filename
eg: original filename :abcdefghijklmnopqrstu.h
i can see like abcdefghijklm
solution to this problem is highly... (2 Replies)
All,
I need to grab and rename common files from several unique directory structures. For example, the directory structures looks like:
/unique_dir/common/common/common/person_name_dir/common_file.txt
There are over 90,000 of these text files that I'd like to put in a single directory as... (5 Replies)
Discussion started by: hburnswell
5 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)