I need help in forming a script to copy files from one location which has a sub directory structure to another location with similar sub directory structure,
say location 1,
/home/rick/tmp_files/1-12/00-25/
here 1-12 are the number of sub directories under tmp_files and 00-25 are sub... (1 Reply)
Hi, Iam new to unix. I have one input file .
Input file :
ID1~Name1~Place1
ID2~Name2~Place2
ID3~Name3~Place3
I need output such that only first column should change to fixed width column of 15 characters of length.
Output File:
ID1<<12 spaces>>Name1~Place1
ID2<<12... (5 Replies)
Create a script that copies files from one specified directory to another specified directory, in the order they were created in the original directory between specified times. Copy the files at a specified interval. (2 Replies)
Hi,
I am new to unix and shell scripting.
Please help me in resolving the below issue.
In my shell script I have a variable which stores the different files with the path. Now I need to move all the files one by one to another location.
----
1.... (4 Replies)
Hi,
I am logging to a linux server through a user "user1" in /home directory.
There is a script in a directory in 'root' for which all permissions are available including the directory. This script when executed creates a file in the directory.
When the script is added to crontab, on... (1 Reply)
I have file file1.txt in location 'loc1'. Now i want a copy of this file in location 'loc2' with a new file called test.txt.
Please help me how to do this in shell script. (1 Reply)
Hi
This is my third past and very impressed with previous post replies
Hoping the same for below query
How to find a existing file location and directory location in solaris box (1 Reply)
A) I would like to achive following actions using shell script. can someone help me with writing the shell script
1) Go to some dir ( say /xyz/logs ) and then perform find operation in this dir and list of subdir using
find . -name "*" -print | xargs grep -li 1367A49001CP0162 >... (1 Reply)
Discussion started by: GG2
1 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)